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  • Journal article
    Chatterjee S, Mazumdar D, Das I, 2026,

    A-site disorder driven competing magnetic phases and large magnetoresistance in R0.5B0.5MnO3 [R, B = Nd, Sm, Sr, Ba]

    , Journal of Physics and Chemistry of Solids, Vol: 209, ISSN: 0022-3697

    The interplay between A-site cationic disorder and electronic bandwidth in the doped manganite compounds governs their emergent magnetic and electronic transport properties, offering a rich platform for exploring correlated electron phenomena. Here, we investigate the polycrystalline Nd<inf>0.25</inf>Sm<inf>0.25</inf>Sr<inf>0.425</inf>Ba<inf>0.075</inf>MnO<inf>3</inf> (NSSBMO) system, where strategic Ba<sup>2+</sup>-ion substitution at the Sr-site introduces significant disorder, while tuning the average A-site ionic radius. Structural analysis reveals an orthorhombic (Pnma space group) phase crystal structure with prominent distorted MnO<inf>6</inf> octahedra, corroborated by a Goldschmidt tolerance factor (t<inf>g</inf>=0.982) deviating from ideal cubic symmetry. Magnetization studies unveil successive transitions: a paramagnetic (PM) to ferromagnetic (FM) transition at T<inf>C</inf>≈148 K, followed by an FM to antiferromagnetic (AFM) transition below T<inf>N</inf>≃48 K, and finally the system settled down to Sm<sup>3+</sup>/Nd<sup>3+</sup>-polarized AFM ground state at very low-temperatures. Electrical transport measurements reveal a metal-to-insulator transition (MIT) at T<inf>MIT</inf>≈125 K, closely correlated with magnetic ordering, underscoring strong magneto-electronic coupling. Notably, our studied FM predominant system achieves a colossal magnetoresistance (CMR) of -MR≈2500% around 75 K for ΔH=90 kOe, driven by dual mechanisms−low-field spin-polarized tunneling (50% contribution to the total MR) at grain boundaries and high-field intrinsic double-exchange interactions. Unconventional high-field exchange bias and an FM-insulating regime, where FM spin alignment coexists with inhibited e<inf>g</inf> electron percolation, further highlight the phase competition. T
  • Journal article
    Oishi K, Aoki M, Kuribayashi S, Ueda S, Ueno K, Chadeau N, Clouvel T, Fujii Y, Fukao Y, Higashide M, Igarashi Y, Mihara S, Nishiguchi H, Okabe K, Uchida Yet al., 2026,

    Development of the Range Counter for the COMET Phase-α Experiment

    , NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 1082, ISSN: 0168-9002
  • Journal article
    Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Lee K, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Turkcapar S, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Laux Kuhn T, Macedo M, Martins J, Mota Amarilo K, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Tomei TRFP, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Carvalho Antuneset al., 2025,

    Search for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>γ</mml:mi> <mml:mi>H</mml:mi> </mml:math> production and constraints on the Yukawa couplings of light quarks to the Higgs boson

    , Physical Review D, Vol: 112, ISSN: 2470-0010

    <jats:p> A search for <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mi>γ</a:mi> <a:mi>H</a:mi> </a:math> production is performed with data from the CMS experiment at the LHC corresponding to an integrated luminosity of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"> <c:mn>138</c:mn> <c:mtext> </c:mtext> <c:mtext> </c:mtext> <c:msup> <c:mi>fb</c:mi> <c:mrow> <c:mo>−</c:mo> <c:mn>1</c:mn> </c:mrow> </c:msup> </c:math> at a proton-proton center-of-mass collision energy of <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"> <e:mrow> <e:mn>13</e:mn> <e:mtext> </e:mtext> <e:mtext> </e:mtext> <e:mi>TeV</e:mi> </e:mrow> </e:math> . The analysis focuses on the topology of a boosted Higgs boson recoiling against a high-energy photon. The final states of <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"> <g:mi>H</g:mi> <g:mo stretchy="false">→</g:mo>
  • Journal article
    Zwalinski L, Zou W, Zormpa O, Zorbas TG, Zoch K, Zoccoli A, Živkovic L, Ziolkowski M, Zinsser J, Zimine NI, Zhukov K, Zhuang X, Zhu Y, Zhu Y, Zhu X, Zhu J, Zhu CG, Zhou Y, Zhou Y, Zhou N, Zhou H, Zhou B, Zhong D, Zheng Z, Zheng X, Zheng K, Zheng J, Zhemchugov A, Zhao Z, Zhao Z, Zhao Y, Zhao T, Zhao H, Zhang Z, Zhang Z, Zhang Z, Zhang Y, Zhang Y, Zhang Y, Zhang X, Zhang X, Zhang T, Zhang S, Zhang S, Zhang R, Zhang P, Zhang L, Zhang L, Zhang K, Zhang J, Zhang J, Zhang DF, Zhai M, Zerwas D, Zerradi S, Zenz S, Ženiš T, Zenin O, Zenger DT, Zeng JC, Zeng H, Zeitnitz C, Zaplatilek O, Zanzi D, Zang J, Saa JAZ, Zambito S, Zakareishvili T, Zak ZK, Zaid E, Zabinski B, Zaazoua M, Yue L, Yuan R, Yuan M, Yuan J, Yu Y, Yu C, Young C, Young CJS, Younas S, Yorita K, Yin P, Yildirim TP, Yexley MR, Yeo BK, Yeletskikh I, Yeh Y, Ye X, Ye S, Ye J, Ye H, Ye H, Yao WM, Yang Z, Yang Y, Yang Y, Yang X, Yang X, Yang Tet al., 2025,

    Total Cost of Ownership and Evaluation of Google Cloud Resources for the ATLAS Experiment at the LHC

    , Computing and Software for Big Science, Vol: 9

    The ATLAS Google Project was established as part of an ongoing evaluation of the use of commercial clouds by the ATLAS Collaboration, in anticipation of the potential future adoption of such resources by WLCG grid sites to fulfil or complement their computing pledges. Seamless integration of Google cloud resources into the worldwide ATLAS distributed computing infrastructure was achieved at large scale and for an extended period of time, and hence cloud resources are shown to be an effective mechanism to provide additional, flexible computing capacity to ATLAS. For the first time a total cost of ownership analysis has been performed, to identify the dominant cost drivers and explore effective mechanisms for cost control. Network usage significantly impacts the costs of certain ATLAS workflows, underscoring the importance of implementing such mechanisms. Resource bursting has been successfully demonstrated, whilst exposing the true cost of this type of activity. A follow-up to the project is underway to investigate methods for improving the integration of cloud resources in data-intensive distributed computing environments and reducing costs related to network connectivity, which represents the primary expense when extensively utilising cloud resources.
  • Journal article
    Hall G, 2025,

    The evolution of particle physics electronics

    , Journal of Instrumentation, Vol: 20, Pages: C12006-C12006

    <jats:title>Abstract</jats:title> <jats:p>Since the foundation of CERN in 1954, there have been significant changes in detector technologies which in turn have necessitated big changes in readout and data acquisition electronics. Many of them have taken place since about 1990 during preparations for LHC, profiting especially from the commercial impetus driving the rapid growth of consumer electronics. It is arguable that the most important developments in LHC particle physics detectors were in the electronics area, with increasing use of custom integrated circuits (ASICs) on an enormous scale compared to the past; the application of fibre-optic links, also on a large scale and previously virtually unknown in high energy physics, and rapid advances in programmable digital electronics, culminating in extremely large, powerful FPGAs, which have been exploited for flexible data acquisition and triggering. Using these rapidly-evolving technologies presented formidable technical challenges, fortunately mostly successfully overcome. However, even the largest particle physics applications are still on a very modest scale compared to commercial demands, raising issues such as access to manufacturers at reasonable costs and delivery schedules. The use of electronic circuitry actually predates CERN and some early applications, such as triggering detectors and storing data electronically, are still among those which drive developments today. It is informative to look at some history to try to foresee implications for the future.</jats:p>
  • Journal article
    Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Lee K, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain SA, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Turkcapar S, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, De Souza RG, Laux Kuhn T, Macedo M, Martins J, Mota Amarilo K, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Fernandez Perez Tomei TR, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Carvalhet al., 2025,

    Development of systematic uncertainty-aware neural network trainings for binned-likelihood analyses at the LHC

    , The European Physical Journal C, Vol: 85

    <jats:title>Abstract</jats:title> <jats:p> We propose a neural network training method capable of accounting for the effects of systematic variations of the data model in the training process and describe its extension towards neural network multiclass classification. The procedure is evaluated on the realistic case of the measurement of Higgs boson production via gluon fusion and vector boson fusion in the <jats:inline-formula> <jats:alternatives> <jats:tex-math>$${\uptau } {\uptau } $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>τ</mml:mi> <mml:mi>τ</mml:mi> </mml:mrow> </mml:math> </jats:alternatives> </jats:inline-formula> decay channel at the CMS experiment. The neural network output functions are used to infer the signal strengths for inclusive production of Higgs bosons as well as for their production via gluon fusion and vector boson fusion. We observe improvements of 12 and 16% in the uncertainty in the signal strengths for gluon and vector-boson fusion, respectively, compared with a conventional neural network training based on cross-entropy. </jats:p>
  • Journal article
    Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Turkcapar S, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Laux Kuhn T, Macedo M, Martins J, Mota Amarilo K, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Fernandez Perez Tomei TR, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Carvalho Aet al., 2025,

    Search for a cH signal in the associated production of at least one charm quark with a Higgs boson in the diphoton decay channel in pp collisions at $$\sqrt{s}=13$$ TeV

    , Journal of High Energy Physics, Vol: 2025

    <jats:title> A <jats:sc>bstract</jats:sc> </jats:title> <jats:p> This paper presents the first search for a cH signal sensitive to the coupling of the charm quark (c) to the Higgs boson (H) in the associated production of at least one charm quark with a Higgs boson decaying to two photons. The results are based on a data set of proton-proton collisions at a center-of-mass energy of 13 TeV collected with the CMS experiment at the LHC, corresponding to an integrated luminosity of 138 fb <jats:sup> <jats:italic>−</jats:italic> 1 </jats:sup> . Assuming the standard model (SM) rates for all other Higgs boson production processes, the observed (expected) upper limit at 95% confidence level on the cH signal strength is 243 (355) times the SM prediction. Under the same assumption, the observed (expected) allowed interval on the Higgs boson to charm quark coupling modifier, <jats:italic>κ</jats:italic> <jats:sub>c</jats:sub> , is <jats:italic>|κ</jats:italic> <jats:sub>c</jats:sub> <jats:italic>| &lt;</jats:italic> 38 <jats:italic>.</jats:italic> 1 ( <jats:italic>|κ</jats:italic> <jats:sub>c</jats:sub> <jats:italic>| &lt;</jats:italic> 72 <jats:italic>.</jats:italic> 5) at 95% confidence level. </jats:p>
  • Journal article
    Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Damanakis K, Dragicevic M, Giordano C, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Shooshtari M, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Ocampo Henao D, Van Laer T, Van Mechelen P, Bierkens J, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Kashko P, Lowette S, Makarenko I, Müller D, Song J, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, Zhang F, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Cappati A, De Favereau De Jeneret J, Delaere C, Giammanco A, Guzel AO, Lemaitre V, Lidrych J, Malek P, Mastrapasqua P, Turkcapar S, Alves GA, Barroso Ferreira Filho M, Coelho E, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Brandao Malbouisson H, Carvalho W, Chinellato J, Costa Reis M, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Jesus SS, Laux Kuhn T, Macedo M, Mota Amarilo K, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Torres Da Silva De Araujo F, Bernardes CA, Fernandez Perez Tomei TR, Gregores EM, Lopes Da Costa B, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Aleksandrov A, Antchev G, Danev P, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Keshri S, Laroze D, Thakur S, Brooks W, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Wang X, Chen GM, Chen HS, Chen M, Chen Y, Hou Q, Hou X, Iemmi F, Jiang CH, Kapoor A, Liao H, Liuet al., 2025,

    A method for correcting the substructure of multiprong jets using the Lund jet plane

    , Journal of High Energy Physics, Vol: 2025

    <jats:title> A <jats:sc>bstract</jats:sc> </jats:title> <jats:p> Many analyses at the CERN LHC exploit the substructure of jets to identify heavy resonances produced with high momenta that decay into multiple quarks and/or gluons. This paper presents a new technique for correcting the substructure of simulated large-radius jets from multiprong decays. The technique is based on reclustering the jet constituents into several subjets such that each subjet represents a single prong, and separately correcting the radiation pattern in the Lund jet plane of each subjet using a correction derived from data. The data presented here correspond to an integrated luminosity of 138 fb <jats:sup> <jats:italic>−</jats:italic> 1 </jats:sup> collected by the CMS experiment between 2016–2018 at a center-of-mass energy of 13 TeV. The correction procedure improves the agreement between data and simulation for several different substructure observables of multiprong jets. This technique establishes, for the first time, a robust calibration for the substructure of jets with four or more prongs, enabling future measurements and searches for new phenomena containing these signatures. </jats:p>
  • Journal article
    Zwalinski L, Zou W, Zormpa O, Zorbas TG, Zoch K, Zoccoli A, Živković L, Ziolkowski M, Zinsser J, Zimine NI, Zhukov K, Zhuang X, Zhu Y, Zhu Y, Zhu X, Zhu J, Zhu CG, Zhou Y, Zhou Y, Zhou Y, Zhou N, Zhou H, Zhou B, Zhong D, Zheng Z, Zheng X, Zheng K, Zheng J, Zhemchugov A, Zhao Z, Zhao Z, Zhao Y, Zhao T, Zhao H, Zhang Z, Zhang Z, Zhang Z, Zhang Y, Zhang Y, Zhang Y, Zhang X, Zhang T, Zhang S, Zhang S, Zhang R, Zhang P, Zhang L, Zhang L, Zhang K, Zhang J, Zhang J, Zhang DF, Zhai M, Zerwas D, Zerradi S, Zenz S, Ženiš T, Zenin O, Zenger DT, Zeng JC, Zeng H, Zeitnitz C, Zaplatilek O, Zanzottera R, Zanzi D, Zang J, Zamora Saa JA, Zambito S, Zakareishvili T, Zak ZK, Zaid E, Zahir I, Zabinski B, Zaazoua M, Yue L, Yuan R, Yuan M, Yuan J, Yu Y, Yu C, Young C, Young CJS, Younas S, Yorita K, Yin P, Yildirim TP, Yexley MR, Yeo B, Yeletskikh I, Yeh Y, Ye X, Ye S, Ye J, Ye H, Yao WM, Yang Y, Yang Y, Yang X, Yang X, Yang Tet al., 2025,

    A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps

    , European Physical Journal C, Vol: 85, ISSN: 1434-6044

    A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. Simultaneous, continuous corrections to the b-jet, c-jet, and light-flavour jet classification probabilities from jet-tagging algorithms in simulation are derived for b-jets using tt¯→eμννbb data. After application of the derived calibration maps, closure between simulation and observation is achieved for jet flavour observables used in ATLAS analyses of Large Hadron Collider (LHC) Run 2 proton-proton collision data. This continuous calibration opens up new possibilities for the future use of jet flavour information in LHC analyses and also serves as a guide for deriving high-dimensional corrections to simulation via transportation maps, an important development for a broad range of inference tasks.
  • Journal article
    Aad G, Abbott B, Abeling K, Abicht NJ, Abidi SH, Aboulhorma A, Abramowicz H, Abreu H, Abulaiti Y, Abusleme Hoffman AC, Acharya BS, Adam Bourdarios C, Adamczyk L, Adamek L, Addepalli SV, Addison MJ, Adelman J, Adiguzel A, Adye T, Affolder AA, Afik Y, Agaras MN, Agarwala J, Aggarwal A, Agheorghiesei C, Ahmad A, Ahmadov F, Ahmed WS, Ahuja S, Ai X, Aielli G, Ait Tamlihat M, Aitbenchikh B, Aizenberg I, Akbiyik M, Åkesson TPA, Akimov AV, Akiyama D, Akolkar NN, Al Khoury K, Alberghi GL, Albert J, Albicocco P, Albouy GL, Alderweireldt S, Aleksa M, Aleksandrov IN, Alexa C, Alexopoulos T, Alfonsi A, Alfonsi F, Algren M, Alhroob M, Ali B, Ali HMJ, Ali S, Alibocus SW, Aliev M, Alimonti G, Alkakhi W, Allaire C, Allbrooke BMM, Allen JF, Allendes Flores CA, Allport PP, Aloisio A, Alonso F, Alpigiani C, Alvarez Estevez M, Alvarez Fernandez A, Alviggi MG, Aly M, Amaral Coutinho Y, Ambler A, Amelung C, Amerl M, Ames CG, Amidei D, Amor Dos Santos SP, Amos KR, Ananiev V, Anastopoulos C, Andeen T, Anders JK, Andrean SY, Andreazza A, Angelidakis S, Angerami A, Anisenkov AV, Annovi A, Antel C, Anthony MT, Antipov E, Antonelli M, Antrim DJA, Anulli F, Aoki M, Aoki T, Aparisi Pozo JA, Aparo MAet al., 2025,

    Erratum: Measurement of the total and differential cross-sections of (Formula Presented.) production in pp collisions at (Formula Presented.) = 13 TeV with the ATLAS detector (Journal of High Energy Physics, (2024), 2024, 5, (131), 10.1007/JHEP05(2024)131)

    , Journal of High Energy Physics, Vol: 2025

    On the original published paper the symbol l was not rendered correctly in following plots: • Figure 4: x-axis names • Figures 5(a)–5(d): region name • Figures 2, 3, 10(a) and 10(b): x-axis and region names The originally published wrong file has been replaced online.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Van Laer T, Van Mechelen P, Breugelmans N, D'Hondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Malara A, Paredes S, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Mota Amarilo K, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Laux Kuhn T, Macedo M, Martins J, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Fernandez Perez Tomei TR, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Carvalho Antunes De Oliveira A, Deng S, Guo B, Jiang C, Levin Aet al., 2025,

    Performance of heavy-flavour jet identification in Lorentz-boosted topologies in proton-proton collisions at √( <i>s</i> ) = 13 TeV

    , Journal of Instrumentation, Vol: 20, Pages: P11006-P11006

    <jats:title>Abstract</jats:title> <jats:p> Measurements in the highly Lorentz-boosted regime provoke increased interest in probing the Higgs boson properties and in searching for particles beyond the standard model at the LHC. In the CMS Collaboration, various boosted-object tagging algorithms, designed to identify hadronic jets originating from a massive particle decaying to bb̅ or cc̅, have been developed and deployed across a range of physics analyses. This paper highlights their performance on simulated events, and summarizes novel calibration techniques using proton-proton collision data collected at √( <jats:italic>s</jats:italic> ) = 13 TeV during the 2016–2018 LHC data-taking period. Three dedicated methods are used for the calibration in multijet events, leveraging either machine learning techniques, the presence of muons within energetic boosted jets, or the reconstruction of hadronically decaying high-energy Z bosons. The calibration results, obtained through a combination of these approaches, are presented and discussed. </jats:p>
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Aleksiejunas R, Alessio F, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreola P, Andreotti M, Andres Estrada S, Anelli A, Ao D, Archilli F, Areg Z, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Ataíde Da Silva R, Atzeni M, Audurier B, Authier JA, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Balboni A, Baldini W, Baldwin Z, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartz J, Bashir S, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NA, Belin S, Bellavista A, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bezshyyko O, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc Fet al., 2025,

    Inclusive B-meson flavour-tagging algorithm at LHCb

    , Journal of High Energy Physics, Vol: 2025

    A new algorithm is developed to identify the flavour of neutral B mesons at production in pp collisions by utilising all tracks from the hadronisation process. The algorithm is calibrated separately for B<sup>0</sup> and Bs0 mesons using B<sup>0</sup> → J/ψK<sup>+</sup>π<sup>−</sup> and Bs0→Ds−π+ decays from pp collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV. This new algorithm improves the tagging power by 35% for B<sup>0</sup> mesons and 20% for Bs0 mesons when compared to the combined performance of the existing LHCb flavour-tagging algorithms.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Lentdecker G, Evard H, Favart L, Gianneios P, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Amarilo KM, Samalan A, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Wertz S, Alves GA, Alves Gallo Pereira M, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Moraes A, Rebello Teles P, Soeiro M, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Macedo M, Martins J, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Fernandez Perez Tomei TR, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Yi K, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Deng S, Guo B, Jiang C, Levin A, Li C, Li Q Met al., 2025,

    Study of same-sign W boson scattering and anomalous couplings in events with one tau lepton from pp collisions at $$\sqrt{s}=13$$ TeV

    , Journal of High Energy Physics, Vol: 2025

    <jats:title> A <jats:sc>bstract</jats:sc> </jats:title> <jats:p> A first study is presented of the cross section for the scattering of same-sign W boson pairs via the detection of a <jats:italic>τ</jats:italic> lepton. The data from proton-proton collisions at the center-of-mass energy of 13 TeV were collected by the CMS detector at the LHC, and correspond to an integrated luminosity of 138 fb <jats:sup>−1</jats:sup> . Events were selected that contain two jets with large pseudorapidity and large invariant mass, one <jats:italic>τ</jats:italic> lepton, one light lepton (e or <jats:italic>μ</jats:italic> ), and significant missing transverse momentum. The measured cross section for electroweak same-sign WW scattering is <jats:inline-formula> <jats:tex-math>$${1.44}_{-0.56}^{+0.63}$$</jats:tex-math> </jats:inline-formula> times the standard model prediction. In addition, a search is presented for the indirect effects of processes beyond the standard model via the effective field theory framework, in terms of dimension-6 and dimension-8 operators. </jats:p>
  • Journal article
    Abe K, Abe S, Akutsu R, Alarakia-Charles H, Alj Hakim YI, Alonso Monsalve S, Anthony L, Aoki S, Apte KA, Arai T, Arihara T, Arimoto S, Ashida Y, Atkin ET, Babu N, Baranov V, Barker GJ, Barr G, Barrow D, Bates P, Bathe-Peters L, Batkiewicz-Kwasniak M, Baudis N, Berardi V, Berns L, Bhattacharjee S, Blanchet A, Blondel A, Bolognesi S, Bordoni S, Boyd SB, Bronner C, Bubak A, Buizza Avanzini M, Caballero JA, Cadoux F, Calabria NF, Cao S, Cap S, Carabadjac D, Cartwright SL, Casado MP, Catanesi MG, Chakrani J, Chalumeau A, Chvirova A, Collazuol G, Cormier F, Craplet AAL, Cudd A, D'ago D, Dalmazzone C, Daret T, Dasgupta P, Davis C, Davydov YI, De Rosa G, Dealtry T, Densham C, Dergacheva A, Dharmapal Banerjee R, Di Lodovico F, Diaz Lopez G, Dolan S, Douqa D, Doyle TA, Drapier O, Duffy KE, Dumarchez J, Dunne P, Dygnarowicz K, Eguchi A, Elias J, Emery-Schrenk S, Erofeev G, Ershova A, Eurin G, Fedorova D, Fedotov S, Feltre M, Feng L, Ferlewicz D, Finch AJ, Fitton MD, Forza C, Friend M, Fujii Y, Fukuda Y, Furui Y, García-Marcos J, Germer AC, Giannessi L, Giganti C, Glagolev V, Gonin M, González Jiménez R, González Rosa J, Goodman EAG, Gorshanov K, Govindaraj P, Grassi M, Guigue M, Guo FY, Hadley DR, Han S, Harris DA, Harris RJ, Hasegawa T, Hasnip CM, Hassani S, Hastings NC, Hayato Y, Heitkamp I, Henaff D, Hino Y, Holeczek J, Holin A, Holvey T, Hong Van NT, Honjo T, Hooft MCF, Hosokawa K, Hu J, Ichikawa AK, Ieki K, Ikeda M, Ishida T, Ishitsuka M, Izmaylov A, Jachowicz N, Jenkins SJ, Jesús-Valls C, Jia M, Jiang JJ, Ji JY, Jones TP, Jonsson P, Joshi S, Kabirnezhad M, Kaboth AC, Kakuno H, Kameda J, Karpova S, Kasturi VS, Kataoka Y, Katori T, Kawamura Y, Kawaue M, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, King S, Kiseeva V, Kisiel J, Klustová A, Kneale L, Kobayashi H, Koch L, Kodama S, Kolupanova M, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kudenko Y, Kudo Y, Kumar Jha A, Kurjata R, Kurochka V, Kutter T, Labarga L, Lachat M, Lachner K, Lagoda J, Lakshmi SM, Lamers James M, Laet al., 2025,

    First Differential Measurement of the Single π^{+} Production Cross Section in Neutrino Neutral-Current Scattering.

    , Phys Rev Lett, Vol: 135

    Since its first observation in the 1970s, neutrino-induced neutral-current single positive pion production (NC1π^{+}) has remained an elusive and poorly understood interaction channel. This process is a significant background in neutrino oscillation experiments and studying it further is critical for the physics program of next-generation accelerator-based neutrino oscillation experiments. In this Letter, we present the first double-differential cross-section measurement of NC1π^{+} interactions using data from the ND280 detector of the T2K experiment collected in ν-beam mode. The measured flux-averaged integrated cross section is σ=(6.07±1.22)×10^{-41}  cm^{2}/nucleon. We compare the results on a hydrocarbon target to the predictions of several neutrino interaction generators and final-state-interaction models. While model predictions agree with the differential results, the data show a weak preference for a cross-section normalization approximately 30% higher than predicted by most models studied in this Letter.
  • Journal article
    Abubakar S, Acero MA, Acharya B, Adamson P, Anfimov N, Antoshkin A, Arrieta-Diaz E, Asquith L, Aurisano A, Azevedo D, Back A, Balashov N, Baldi P, Bambah BA, Bannister EF, Barros A, Bat A, Bays K, Bernstein R, Bezerra TJC, Bhatnagar V, Bhuyan B, Bian J, Booth AC, Bowles R, Brahma B, Bromberg C, Buchanan N, Butkevich A, Calvez S, Carceller JM, Carroll TJ, Catano-Mur E, Cesar JP, Chirco R, Choudhary BC, Christensen A, Cicala MF, Coan TE, Contreras T, Cooleybeck A, Coveyou D, Cremonesi L, Davies GS, Derwent PF, Ding P, Djurcic Z, Dobbs K, Dolce M, Dueñas Tonguino D, Dukes EC, Dye A, Ehrlich R, Ewart E, Filip P, Frank MJ, Gallagher HR, Giri A, Gomes RA, Goodman MC, Group R, Habig A, Hakl F, Hartnell J, Hatcher R, Hays JM, He M, Heller K, Hewes V, Himmel A, Horoho T, Ivanova A, Jargowsky B, Kakorin I, Kalitkina A, Kaplan DM, Khanam A, Kirezli B, Kleykamp J, Klimov O, Koerner LW, Kolupaeva L, Kralik R, Kumar A, Kuruppu CD, Kus V, Lackey T, Lang K, Lasorak P, Lesmeister J, Lister A, Liu J, Lock JA, MacMahon M, Magill S, Mann WA, Manoharan MT, Manrique Plata M, Marshak ML, Martinez-Casales M, Matveev V, Mehta B, Messier MD, Meyer H, Miao T, Miller WH, Mishra SR, Mohanta R, Moren A, Morozova A, Mu W, Mualem L, Muether M, Mulder K, Myers D, Naples D, Nelleri S, Nelson JK, Nichol R, Niner E, Norman A, Norrick A, Oh H, Olshevskiy A, Olson T, Ozkaynak M, Pal A, Paley J, Panda L, Patterson RB, Pawloski G, Petti R, Plunkett RK, Porter JCC, Prais LR, Rafique A, Raj V, Rajaoalisoa M, Ramson B, Rebel B, Robles E, Roy P, Samoylov O, Sanchez MC, Sánchez Falero S, Shanahan P, Sharma P, Sheshukov A, Shivam, Shmakov A, Shorrock W, Shukla S, Singh I, Singh P, Singh V, Singh Chhibra S, Singha DK, Smith A, Smolik J, Snopok P, Solomey N, Sousa A, Soustruznik K, Strait M, Suter L, Sutton A, Swain S, Sweeney C, Sztuc A, Talukdar N, Tas P, Thakore T, Thomas J, Tiras E, Titus M, Torun Y, Tran D, Trokan-Tenorio J, Urheim J, Vahle P, Vallari Z, Vockerodt KJ, Waldron AV, Wallbank M, Warburton TK Wet al., 2025,

    Joint neutrino oscillation analysis from the T2K and NOvA experiments

    , Nature, Vol: 646, Pages: 818-824, ISSN: 0028-0836

    The landmark discovery that neutrinos have mass and can change type (or flavour) as they propagate—a process called neutrino oscillation1,2,3,4,5,6—has opened up a rich array of theoretical and experimental questions being actively pursued today. Neutrino oscillation remains the most powerful experimental tool for addressing many of these questions, including whether neutrinos violate charge-parity (CP) symmetry, which has possible connections to the unexplained preponderance of matter over antimatter in the Universe7,8,9,10,11. Oscillation measurements also probe the mass-squared differences between the different neutrino mass states (Δm2), whether there are two light states and a heavier one (normal ordering) or vice versa (inverted ordering), and the structure of neutrino mass and flavour mixing12. Here we carry out the first joint analysis of datasets from NOvA13 and T2K14, the two currently operating long-baseline neutrino oscillation experiments (hundreds of kilometres of neutrino travel distance), taking advantage of our complementary experimental designs and setting new constraints on several neutrino sector parameters. This analysis provides new precision on the
  • Journal article
    Abe K, Abe S, Akutsu R, Alarakia-Charles H, Hakim YIA, Monsalve SA, Anthony L, Aoki S, Apte KA, Arai T, Arihara T, Arimoto S, Ashida Y, Atkin ET, Babu N, Baranov V, Barker GJ, Barr G, Barrow D, Bates P, Bathe-Peters L, Batkiewicz-Kwasniak M, Baudis N, Berardi V, Berns L, Bhattacharjee S, Blanchet A, Blondel A, Bolognesi S, Bordoni S, Boyd SB, Bronner C, Bubak A, Avanzini MB, Caballero JA, Cadoux F, Calabria NF, Cao S, Cap S, Carabadjac D, Cartwright SL, Casado MP, Catanesi MG, Chakrani J, Chalumeau A, Chvirova A, Collazuol G, Cormier F, Craplet AAL, Cudd A, Dago D, Dalmazzone C, Daret T, Dasgupta P, Davis C, Davydov YI, De Rosa G, Dealtry T, Densham C, Dergacheva A, Banerjee RD, Di Lodovico F, Lopez GD, Dolan S, Douqa D, Doyle TA, Drapier O, Duffy KE, Dumarchez J, Dunne P, Dygnarowicz K, Eguchi A, Elias J, Emery-Schrenk S, Erofeev G, Ershova A, Eurin G, Fedorova D, Fedotov S, Feltre M, Feng L, Ferlewicz D, Finch AJ, Fitton MD, Forza C, Friend M, Fujii Y, Fukuda Y, Furui Y, García-Marcos J, Germer AC, Giannessi L, Giganti C, Glagolev V, Gonin M, Jiménez RG, Rosa JG, Goodman EAG, Gorshanov K, Govindaraj Pet al., 2025,

    Signal selection and model-independent extraction of the neutrino neutral-current single π+ cross section with the T2K experiment

    , Physical Review D, Vol: 112, ISSN: 2470-0010

    This article presents a study of single π<sup>+</sup> production in neutrino neutral-current interactions (NC1π<sup>+</sup>) using the FGD1 hydrocarbon target of the ND280 detector of the T2K experiment. We report the largest sample of such events selected by any experiment, providing the first new data for this channel in over four decades and the first using a sub-GeV neutrino flux. The signal selection strategy and its performance are detailed together with validations of a robust cross section extraction methodology. The measured fluxaveraged integrated cross-section is σ = (6.07 ± 1.22) × 10<sup>−41</sup> cm<sup>2</sup>/nucleon, 1.3σ above the NEUT v5.4.0 expectation.
  • Journal article
    Ahmed A, Sharma J, Bhattacharya A, Biswas A, Singha T, Mudryk Y, Alam A, Das Iet al., 2025,

    Unconventional Anomalous Hall Effect in Hexagonal Polar Magnet Y3Co8Sn4

    , Advanced Functional Materials, Vol: 35, ISSN: 1616-301X

    A rare realization of unconventional anomalous Hall effect (UAHE) both below and above the magnetic transition temperature (T<inf>C</inf>) in a hexagonal noncentrosymmetric magnet Y<inf>3</inf>Co<inf>8</inf>Sn<inf>4</inf>, using a combined experimental and ab initio calculations. Occurrence of such UAHE is mainly attributed to the reciprocal ((Formula presented.)) topology (i.e., the presence of topological Weyl points at/near the Fermi level), along with some contribution from the topological magnetic texture (at low temperatures), as inferred from the measured field-dependent ac susceptibility. The effect of UAHE on the measured transport behavior however evolves differently with temperature above and below T<inf>C</inf> = 53 K, suggesting different physical mechanism responsible in the two phases. A unique planar ferrimagnetic ordering is found to be the most stable state with ab-plane as the easy plane below T<inf>C</inf>. The simulated net magnetization and the moment per Co atom agrees fairly well with the experimentally measured values. A reasonably large anomalous Hall conductivity (AHC) is also observed in both the phases (above and below T<inf>C</inf>) of the present compound, which is again not so ubiquitous. The results underscore the family of R<inf>3</inf>Co<inf>8</inf>Sn<inf>4</inf> (R = rare earth) polar magnets as a compelling backdrop for exploring the synergy of magnetism and topological non-trivial electronic states, pivotal for spintronic applications.
  • Journal article
    Chatterjee S, Das I, 2025,

    Tuning colossal magnetoresistance through A-site ionic radius in polycrystalline Gd0.5Ca0.5−xSrxMnO3 (x = 0.0-0.5) systems

    , Journal of Applied Physics, Vol: 138, ISSN: 0021-8979

    The magnetotransport properties of polycrystalline Gd 0.5 Ca 0.5 − x Sr x MnO 3 systems reveal a significant enhancement in magnetoresistance with increasing A-site ionic radius, transitioning from “Ca” to “Sr.” Notably, Gd 0.5 Ca 0.5 MnO 3 exhibits only a weak magnetoresistance, while complete substitution of Ca 2 + with the larger Sr 2 + ion in Gd 0.5 Sr 0.5 MnO 3 results in a striking colossal magnetoresistance. This contrasting behavior highlights the critical role of the A-site divalent cation size in modulating the electronic bandwidth, suppressing charge-orbital ordering, and governing the interplay between competing magnetic and electronic ground states. Materials exhibiting such large magnetoresistance are of great interest for various spintronic applications. In polycrystalline Gd 0.5 Sr 0.5 MnO 3 (GSMO), an exceptionally high magnetoresistance of 10 9 % is observed at 10 K under a 70 kOe magnetic field, significantly exceeding the values reported for single-crystalline GSMO under similar conditions. Although all studied samples exhibit charge ordering, colossal magnetoresistance is exclusive to GSMO. This phenomenon can be attributed to a magnetic-field-induced transition from a charge-ordered antiferromagnetic insulating state to a ferromagnetic metallic state.
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Aliouche Z, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreola P, Andreotti M, Anelli A, Ao D, Archilli F, Areg Z, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Ataíde Da Silva R, Atzeni M, Audurier B, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Balboni A, Baldini W, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartz J, Bashir S, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NA, Belin S, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bezshyyko O, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc F, Blank JE, Blusk S, Bocharnikov V, Boelhauve JA, Boente Garcia O, Boettcher T, Bohare A, Boldyrev A, Bolognani CS, Bolzonella R, Bonacci RB, Bondar N, Bordelius A, Borgato F, Borghi S, Borsato M, Borsuk JT, Bottalico E, Bouchiba SA, Bovill M, Bowcock TJV, Boyer A, Bozzi C, Brandenburg JD, Brea Rodriguez A, Breer N, Brodzicka J, Brossa Gonzalo A, Brown J, Brundu D, Buchanan E, Buonincontri L, Burgos Marcos M, Burke AT, Burr C, Butter JS, Buytaert J, Byczynski W, Cadeddu S, Cai H, Caillet A, Calabrese R, Calderon Ramirez S, Calefice L, Cali S, Calvi M, Calvo Gomez M, Camargo Magalhaes P, Cambon Bouzas JI, Campana P, Campora Perez DH, Campoverde Quezada AF, Capelli S, Capriotti L, Caravaca-Mora R, Carbone A, Carcedo Salgado L, Cardinale R, Cardini A, Carniti P, Carus L, Casais Vidal A, Caspary R, Casse G, Cattaneo M, Cavallero G, Cavallini V, Celani S, Cesareet al., 2025,

    Measurement of the Z-Boson Mass.

    , Phys Rev Lett, Vol: 135

    The first dedicated Z-boson mass measurement at the LHC with Z→μ^{+}μ^{-} decays is reported. The dataset uses proton-proton collisions at a center-of-mass energy of 13 TeV, recorded in 2016 by the LHCb experiment, and corresponds to an integrated luminosity of 1.7  fb^{-1}. A template fit to the μ^{+}μ^{-} mass distribution yields the following result for the Z-boson mass: m_{Z}=91,185.7±8.3±3.9  MeV, where the first uncertainty is statistical and the second systematic. This result is consistent with previous measurements and predictions from global electroweak fits.
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Alexander M, Aliouche Z, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreianov A, Andreola P, Andreotti M, Andreou D, Anelli A, Ao D, Archilli F, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Ataíde Da Silva R, Atzeni M, Audurier B, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Balboni A, Baldini W, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartz J, Basels JM, Bashir S, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NA, Belin S, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bezshyyko O, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc F, Blank JE, Blusk S, Bocharnikov V, Boelhauve JA, Boente Garcia O, Boettcher T, Bohare A, Boldyrev A, Bolognani CS, Bolzonella R, Bonacci RB, Bondar N, Bordelius A, Borgato F, Borghi S, Borsato M, Borsuk JT, Bottalico E, Bouchiba SA, Bovill M, Bowcock TJV, Boyer A, Bozzi C, Brandenburg JD, Brea Rodriguez A, Breer N, Brodzicka J, Brossa Gonzalo A, Brown J, Brundu D, Buchanan E, Buonincontri L, Burgos Marcos M, Burke AT, Burr C, Butter JS, Buytaert J, Byczynski W, Cadeddu S, Cai H, Caillet A, Calabrese R, Calderon Ramirez S, Calefice L, Cali S, Calvi M, Calvo Gomez M, Camargo Magalhaes P, Cambon Bouzas JI, Campana P, Campora Perez DH, Campoverde Quezada AF, Capelli S, Capriotti L, Caravaca-Mora R, Carbone A, Carcedo Salgado L, Cardinale R, Cardini A, Carniti P, Carus L, Casais Vidal A, Caspary R, Casse G, Cattaneo M Cet al., 2025,

    Observation of a New Charmed Baryon Decaying to Ξ_{c}^{+}π^{-}π^{+}.

    , Phys Rev Lett, Vol: 135

    The Ξ_{c}^{+}π^{-}π^{+} spectrum is investigated using proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4  fb^{-1}, collected by the LHCb experiment during 2016-2018. Four states are observed with high significance, and their masses and widths are measured to be m[Ξ_{c}(2815)^{+}]=2816.65±0.03±0.03±0.23  MeV, Γ[Ξ_{c}(2815)^{+}]=2.07±0.08±0.12  MeV, m[Ξ_{c}(2923)^{+}]=2922.8±0.3±0.5±0.2  MeV, Γ[Ξ_{c}(2923)^{+}]=5.3±0.9±1.4  MeV, m[Ξ_{c}(2970)^{+}]=2968.6±0.5±0.5±0.2  MeV, Γ[Ξ_{c}(2970)^{+}]=31.7±1.7±1.9  MeV, [Ξ_{c}(3080)^{+}]=3076.8±0.7±1.3±0.2  MeV, Γ[Ξ_{c}(3080)^{+}]=6.8±2.3±0.9  MeV, where the uncertainties are statistical, systematic, and due to the limited precision on the Ξ_{c}^{+} mass, respectively. The Ξ_{c}(2923)^{+} baryon is observed for the first time, and is consistent with being the isospin partner of the previously observed Ξ_{c}(2923)^{0} state. Most of the measured parameters are more precise than existing world averages.
  • Journal article
    Abe K, Abe S, Akutsu R, Alarakia-Charles H, Alj Hakim YI, Alonso Monsalve S, Anthony L, Aoki S, Apte KA, Arai T, Arihara T, Arimoto S, Ashida Y, Atkin ET, Babu N, Baranov V, Barker GJ, Barr G, Barrow D, Bates P, Bathe-Peters L, Batkiewicz-Kwasniak M, Baudis N, Berardi V, Berns L, Bhattacharjee S, Blanchet A, Blondel A, Boistier PMM, Bolognesi S, Bordoni S, Boyd SB, Bronner C, Bubak A, Buizza Avanzini M, Caballero JA, Cadoux F, Calabria NF, Cao S, Cap S, Carabadjac D, Cartwright SL, Casado MP, Catanesi MG, Chakrani J, Chalumeau A, Cherdack D, Chvirova A, Coleman J, Collazuol G, Cormier F, Craplet AAL, Cudd A, Dago D, Dalmazzone C, Daret T, Dasgupta P, Davis C, Davydov YI, de Perio P, De Rosa G, Dealtry T, Densham C, Dergacheva A, Dharmapal Banerjee R, Di Lodovico F, Diaz Lopez G, Dolan S, Douqa D, Doyle TA, Drapier O, Duffy KE, Dumarchez J, Dunne P, Dygnarowicz K, Eguchi A, Elias J, Emery-Schrenk S, Erofeev G, Ershova A, Eurin G, Fedorova D, Fedotov S, Feltre M, Feng L, Ferlewicz D, Finch AJ, Fitton MD, Forza C, Friend M, Fujii Y, Fukuda Y, Furui Y, García-Marcos J, Germer AC, Giannessi L, Giganti C, Girgus M, Glagolev V, Gonin M, González Jiménez R, González Rosa J, Goodman EAG, Gorshanov K, Govindaraj P, Grassi M, Guigue M, Guo FY, Hadley DR, Han S, Harris DA, Harris RJ, Hasegawa T, Hasnip CM, Hassani S, Hastings NC, Hayato Y, Heitkamp I, Henaff D, Hino Y, Holeczek J, Holin A, Holvey T, Hong Van NT, Honjo T, Hooft MCF, Hosokawa K, Hu J, Ichikawa AK, Ieki K, Ikeda M, Ishida T, Ishitsuka M, Ito H, Ito S, Izmaylov A, Jachowicz N, Jenkins SJ, Jesús-Valls C, Jia M, Jiang JJ, Ji JY, Jones TP, Jonsson P, Joshi S, Kabirnezhad M, Kaboth AC, Kakuno H, Kameda J, Karpova S, Kasturi VS, Kataoka Y, Katori T, Kawabata A, Kawamura Y, Kawaue M, Kearns E, Khabibullin M, Khotjantsev A, Kikawa T, King S, Kiseeva V, Kisiel J, Klustová A, Kneale L, Kobayashi H, Koch L, Kodama S, Kolupanova M, Konaka A, Kormos LL, Koshio Y, Kowalik K, Kudenko Y, Kudo Y, Kumar Jha A, Kurjata R, Kurochkaet al., 2025,

    First measurement of the electron-neutrino charged-current pion production cross section on carbon with the T2K near detector

    , Physical Review Letters, Vol: 135, ISSN: 0031-9007

    The T2K Collaboration presents the first measurement of electron neutrino-induced charged-current pion production on a predominantly carbon target in a restricted kinematical phase space. This is performed using data from the 2.5° off-axis near detector, ND280. The differential cross sections with respect to the outgoing electron and pion kinematics, in addition to the total flux-integrated cross section, are obtained. Comparisons between the measured and predicted cross-section results using the neut, genie, and nuwro Monte Carlo event generators are presented. The measured total flux-integrated cross section is [2.52±0.52⁢(stat)±0.30⁢(syst)]×10−39  cm2 nucleon−1, which is lower than the event generator predictions.
  • Journal article
    Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz C-E, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Breugelmans N, D'Hondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Turkcapar S, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Laux Kuhn T, Macedo M, Mota Amarilo K, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Tomei TRFP, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Scheurer V, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Laroze D, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Carvalho Antunes De Oliveira A, Denet al., 2025,

    Search for the Rare Decay D^{0}→μ^{+}μ^{-} in Proton-Proton Collisions at sqrt[s]=13.6  TeV.

    , Phys Rev Lett, Vol: 135

    A search for the rare decay D^{0}→μ^{+}μ^{-} is reported using proton-proton collision events at sqrt[s]=13.6  TeV collected by the CMS detector in 2022-2023, corresponding to an integrated luminosity of 64.5  fb^{-1}. This is the first analysis to use a newly developed inclusive dimuon trigger, expanding the scope of the CMS flavor physics program. The search uses D^{0} mesons obtained from D^{*+}→D^{0}π^{+} decays. No significant excess is observed. A limit on the branching fraction of B(D^{0}→μ^{+}μ^{-})<2.4×10^{-9} at 95% confidence level is set. This is the most stringent upper limit set on any flavor changing neutral current decay in the charm sector.
  • Conference paper
    Stagni F, Boyer A, Tsaregorodtsev A, Haen C, Burr C, Bauer D, Fayer S, Martyniak Jet al., 2025,

    The neXt Dirac incarnation

    , ISSN: 2101-6275

    The DIRAC interware has long served as a vital resource for user communities seeking access to distributed computing resources. Originating within the LHCb collaboration around 2000, DIRAC has undergone significant evolution. Despite its efficacy in meeting experiment-specific requirements, DIRAC has accrued technical debt over its 15-year history. Installation management remains intricate, with significant entry barriers and a reliance on bespoke infrastructure. The software development process lacks alignment with contemporary standards, impeding the onboarding process for new developers. Notably, integral components such as the network protocol and authentication mechanisms are proprietary and pose challenges for seamless integration with external applications. In response to these challenges, the DIRAC consortium has embarked on the development of DiracX. DiracX heralds a new era in distributed computing solutions. This contribution describes technical decisions, roadmap and timelines for the development of DiracX, while recognizing the criticality of maintaining a continuously operational DIRAC system for numerous user communities.
  • Journal article
    Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz CE, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Lee K, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Mota Amarilo K, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Turkcapar S, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho Wet al., 2025,

    Search for a heavy pseudoscalar Higgs boson decaying to a 125 GeV Higgs boson and a Z boson in final states with two tau and two light leptons in proton-proton collisions at TeV

    , Journal of High Energy Physics, Vol: 2025

    A search for a heavy pseudoscalar Higgs boson, A, decaying to a 125 GeV Higgs boson h and a Z boson is presented. The h boson is identified via its decay to a pair of tau leptons, while the Z boson is identified via its decay to a pair of electrons or muons. The search targets the production of the A boson via the gluon-gluon fusion process, gg → A, and in association with bottom quarks,. The analysis uses a data sample corresponding to an integrated luminosity of 138 fb<sup>−1</sup> collected with the CMS detector at the CERN LHC in proton-proton collisions at a centre-of-mass energy of TeV. Constraints are set on the product of the cross sections of the A production mechanisms and the A → Zh decay branching fraction. The observed (expected) upper limit at 95% confidence level ranges from 0.049 (0.060) pb to 1.02 (0.79) pb for the gg → A process and from 0.053 (0.059) pb to 0.79 (0.61) pb for the process in the probed range of the A boson mass, m<inf>A</inf>, from 225 GeV to 1 TeV. The results of the search are used to constrain parameters within the benchmark scenario of the minimal supersymmetric extension of the standard model. Values of tan β below 2.2 are excluded in this scenario at 95% confidence level for all m<inf>A</inf> values in the range from 225 to 350 GeV.
  • Journal article
    Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz CE, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Lee K, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Turkcapar S, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato Jet al., 2025,

    Search for top squarks in final states with many light-flavor jets and 0, 1, or 2 charged leptons in proton-proton collisions at TeV

    , Journal of High Energy Physics, Vol: 2025

    Several new physics models including versions of supersymmetry (SUSY) characterized by R-parity violation (RPV) or with additional hidden sectors predict the production of events with top quarks, low missing transverse momentum, and many additional quarks or gluons. The results of a search for top squarks decaying to two top quarks and six additional light-flavor quarks or gluons are reported. The search employs a novel machine learning method for background estimation from control samples in data using decorrelated discriminators. The search is performed using events with 0, 1, or 2 electrons or muons in conjunction with at least six jets. No requirement is placed on the magnitude of the missing transverse momentum. The result is based on a sample of proton-proton collisions at TeV corresponding to 138 fb<sup>−1</sup> of integrated luminosity collected with the CMS detector at the LHC in 2016–2018. With no statistically significant excess of events observed beyond the expected contributions from the standard model, the data are used to determine upper limits on the top squark pair production cross section in the frameworks of RPV and stealth SUSY. Models with top squark masses less than 700 (930) GeV are excluded at 95% confidence level for RPV (stealth) SUSY scenarios.
  • Journal article
    Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz CE, Janssen T, Kwon H, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Hong Y, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Khalilzadeh A, Khan FA, Lee K, Malara A, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Knolle J, Lambrecht L, Marckx D, Skovpen K, Van Den Bossche N, van der Linden J, Vandenbroeck J, Wezenbeek L, Bein S, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Turkcapar S, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho Wet al., 2025,

    Search for dark matter produced in association with a Higgs boson decaying to a τ lepton pair in proton-proton collisions at TeV

    , Journal of High Energy Physics, Vol: 2025

    A search for dark matter particles produced in association with a Higgs boson decaying into a pair of τ leptons is performed using data collected in proton-proton collisions at a center-of-mass energy of 13 TeV with the CMS detector. The analysis is based on a data set corresponding to an integrated luminosity of 101 fb<sup>−1</sup> collected in 2017–2018. No significant excess over the expected standard model background is observed. This result is interpreted within the frameworks of the 2HDM+a and baryonic Z′ benchmark simplified models. The 2HDM+a model is a type-II two-Higgs-doublet model featuring a heavy pseudoscalar with an additional light pseudoscalar. Upper limits at 95% confidence level are set on the product of the production cross section and the branching fraction for each of these two simplified models. Heavy pseudoscalar boson masses between 400 and 700 GeV are excluded for a light pseudoscalar mass of 100 GeV. For the baryonic Z′ model, a statistical combination is made with an earlier search based on a data set of 36 fb<sup>−1</sup> collected in 2016. In this model, Z′ boson masses up to 1050 GeV are excluded for a dark matter particle mass of 1 GeV.
  • Journal article
    Abe S, Alarakia-Charles H, Alekseev I, Alt C, Arai T, Arihara T, Arimoto S, Artikov AM, Awataguchi Y, Babu N, Baranov V, Barr G, Barrow D, Bartoszek L, Bernardi L, Berns L, Bhattacharjee S, Boikov AV, Blanchet A, Blondel A, Bonnemaison A, Bordoni S, Bui MH, Bui TH, Cadoux F, Cap S, Cauchois A, Chakrani J, Chong PS, Chvirova A, Collard P, Danilov M, Davis C, Davouloury V, Davydov YI, Dergacheva A, Domangue C, Douqa D, Doyle TA, Drapier O, Eguchi A, Elias J, Erofeev G, Favre Y, Fedorova D, Fedotov S, Ferlewicz D, Fujii Y, Fujita R, Furui Y, Gastaldi F, Gendotti A, Germer A, Giannessi L, Giganti C, Glagolev V, Guillaumat R, Ha G, Hastings NC, Heitkamp I, Hu J, Husi C, Ichikawa AK, Ishida TH, Izmaylov A, Iwamoto K, Jakkapu M, Jesús-Valls C, Ji JY, Jonsson P, Jung CK, Kakuno H, Kasturi VS, Kawaue M, Keener PT, Khabibullin M, Khomutov NV, Khotjantsev A, Kikawa T, Kikutani H, Kirichkov NV, Klustová A, Kobayashi H, Kobayashi T, Koch L, Kodama S, Kolesnikov AO, Kolupanova M, Korzenev A, Koto T, Kudenko Y, Kuribayashi S, Kutter T, Lachat M, Lachner K, Lamers James M, Last D, Latham N, Lawe M, Le TA, Leon Silverio D, Li B, Li W, Lin C, Louzir M, Lux T, Mahtani KK, Manly S, Martinez Caicedo DA, Mashin N, Matsubara T, Mauger C, McFarland KS, McGrew C, McKean J, Mefodiev A, Miller E, Mineev O, Minamino A, Moreno AL, Muñoz A, Nakadaira T, Nakagiri K, Nakaya T, Nanni J, Nicolas L, Nguyen AD, Nguyen DT, Nguyen H, Nguyen V, Noah Messomo E, Nosek T, O'Keeffe HM, Ogawa T, Okinaga W, Osu L, Paolone V, Pelleriti G, Pickering L, Ramírez MA, Reh M, Reina G, Riccio C, Roth S, Rubbia A, Saadi F, Sakashita K, Sallin N, Samani S, Sanchez F, Schefke T, Schloesser C, Sgalaberna D, Shaikovskiy A, Shvartsman A, Shiraishi Y, Shvarev N, Skrobova N, Smyczek D, Smy M, Speers A, Svirida D, Ta M, Tairafune S, Tani M, Tanigawa H, Teklu A, Tereshchenko S, Tereshchenko VV, Thaiduc T, Tsushima T, Tzanov M, Uchida Y, Vasilyev II, Villa E, Vladisavljevic T, Wakabayashi D, Wallace H, Weber A, Whitney N, Wret Cet al., 2025,

    Introducing a Markov chain-based time calibration procedure for multi-channel particle detectors: application to the SuperFGD and ToF detectors of the T2K experiment

    , Journal of Instrumentation, Vol: 20, ISSN: 1748-0221

    Inter-channel mis-synchronisation can be a limiting factor to the time resolution of high performance timing detectors with multiple readout channels and independent electronics units. In these systems, time calibration methods employed must be able to efficiently correct for minimal mis-synchronisation between channels and achieve the best detector performance. We present an iterative time calibration method based on Markov Chains, suitable for detector systems with multiple readout channels. Starting from correlated hit pairs alone, and without requiring an external reference time measurement, the method solves for fixed per-channel offsets, with precision limited only by the intrinsic single-channel resolution. A mathematical proof that the method is able to find the correct time offsets to be assigned to each detector channel in order to achieve inter-channel synchronisation is given, and it is shown that the number of iterations to reach convergence within the desired precision is controllable with a single parameter. Numerical studies are used to confirm unbiased recovery of true offsets. Finally, the application of the calibration method to the Super Fine-Grained Detector (SuperFGD) and the Time of Flight (TOF) detector at the upgraded T2K near detector (ND280) shows good improvement in overall timing resolution, demonstrating the effectiveness in a real-world scenario and scalability.
  • Journal article
    Aalbers J, Abe K, Adrover M, Ahmed Maouloud S, Akerib DS, Al Musalhi AK, Alder F, Althueser L, Amaral DWP, Amarasinghe CS, Ames A, Andrieu B, Angelides N, Angelino E, Antunovic B, Aprile E, Araújo HM, Armstrong JE, Arthurs M, Babicz M, Baker A, Balzer M, Bang J, Barberio E, Bargemann JW, Barillier E, Basharina-Freshville A, Baudis L, Bauer D, Bazyk M, Beattie K, Beaupere N, Bell NF, Bellagamba L, Benson T, Bhatti A, Biesiadzinski TP, Biondi R, Biondi Y, Birch HJ, Bishop E, Bismark A, Boehm C, Boese K, Bolotnikov A, Brás P, Braun R, Breskin A, Brew CAJ, Brommer S, Brown A, Bruni G, Budnik R, Burdin S, Cai C, Capelli C, Carini G, Carmona-Benitez MC, Carter M, Chauvin A, Chawla A, Chen H, Cherwinka JJ, Chin YT, Chott NI, Chavez APC, Clark K, Colijn AP, Colling DJ, Conrad J, Converse MV, Cooper LJ, Coronel R, Costanzo D, Cottle A, Cox G, Cuenca-García JJ, Curran D, Cussans D, DAndrea V, Daniel Garcia LC, Darlington I, Dave S, David A, Davies GJ, Decowski MP, Deisting A, Delgaudio J, Dey S, Di Donato C, Di Felice L, Di Gangi P, Diglio S, Ding C, Dobson JEY, Doerenkamp M, Drexlin G, Druszkiewicz E, Dunbar CL, Eitel K, Elykov A, Engel R, Eriksen SR, Fayer S, Fearon NM, Ferella AD, Ferrari C, Fieldhouse N, Fischer H, Flaecher H, Flehmke T, Flierman M, Fraser ED, Fruth TMA, Fujikawa K, Fulgione W, Fuselli C, Gaemers P, Gaior R, Gaitskell RJ, Gallice N, Galloway M, Gao F, Garroum N, Geffre A, Genovesi J, Ghag C, Ghosh S, Giacomobono R, Gibbons R, Girard F, Glade-Beucke R, Glück F, Gokhale S, Grandi L, Green J, Grigat J, van der Grinten MGD, Größle R, Guan H, Guida M, Gyorgy P, Haiston JJ, Hall CR, Hall T, Hammann R, Hannen V, Hansmann-Menzemer S, Hargittai N, Hartigan-OConnor E, Haselschwardt SJ, Hernandez M, Hertel SA, Higuera A, Hils C, Hiraoka K, Hoetzsch L, Hoferichter M, Homenides GJ, Hood NF, Horn M, Huang DQ, Hughes S, Hunt D, Iacovacci M, Itow Y, Jacquet E, Jakob J, James RS, Joerg F, Jones S, Kaboth AC, Kahlert F, Kamaha AC, Kaminaga Y, Kara M, Kavrigin P, Kazama Set al., 2025,

    The XLZD Design Book: towards the next-generation liquid xenon observatory for dark matter and neutrino physics

    , European Physical Journal C, Vol: 85, ISSN: 1434-6044

    This report describes the experimental strategy and technologies for XLZD, the next-generation xenon observatory sensitive to dark matter and neutrino physics. In the baseline design, the detector will have an active liquid xenon target of 60 tonnes, which could be increased to 80 tonnes if the market conditions for xenon are favorable. It is based on the mature liquid xenon time projection chamber technology used in current-generation experiments, LZ and XENONnT. The report discusses the baseline design and opportunities for further optimization of the individual detector components. The experiment envisaged here has the capability to explore parameter space for Weakly Interacting Massive Particle (WIMP) dark matter down to the neutrino fog, with a 3\(\sigma \) evidence potential for WIMP-nucleon cross sections as low as \(3\times 10^{-49}\mathrm \,cm^2\) (at 40 GeV/c\(^2\) WIMP mass). The observatory will also have leading sensitivity to a wide range of alternative dark matter models. It is projected to have a 3\(\sigma \) observation potential of neutrinoless double beta decay of \(^{136}\)Xe at a half-life of up to \(5.7\times 10^{27}\) years. Additionally, it is sensitive to astrophysical neutrinos from the sun and galactic supernovae.
  • Journal article
    Abbaneo D, Ahmad S, Albanese R, Alexandrov A, Alicante F, Aloschi F, Androsov K, Anokhina A, Asawatangtrakuldee C, Ayala Torres MA, Bangaru N, Battilana C, Bay A, Bertocco A, Betancourt C, Bick D, Biswas R, Blanco Castro A, Boccia V, Bogomilov M, Bonacorsi D, Bonivento WM, Bordalo P, Boyarsky A, Buontempo S, Cafaro V, Campanelli M, Camporesi T, Canale V, Centanni D, Cerutti F, Chariton V, Chernyavskiy M, Chiuchiolo A, Choi KY, Cindolo F, Climescu M, Crupano A, Dallavalle GM, D'Ambrosio N, Davino D, de Asmundis R, de Bryas PT, De Lellis G, de Magistris M, De Marzi G, De Pasquale S, De Roeck A, De Rújula A, De Simone D, De Souza Santos H, Diaz Gutierrez MA, Di Crescenzo A, Di Cristo C, Di Ferdinando D, Dinc C, Donà R, Durhan O, Fasanella D, Fecarotta O, Fedotovs F, Ferrillo M, Fiorillo A, Fresa R, Funicello N, Funk W, Galati G, Giordano V, Golutvin A, Graverini E, Guiducci L, Guler AM, Guliaeva V, Haefeli GJ, Hagner C, Helo Herrera JC, van Herwijnen E, Iaiunese A, Iengo P, Ilieva S, Infante Cabanas SA, Infantino A, Iuliano A, Kamiscioglu C, Kauniskangas AM, Khalikov E, Kim SH, Kim YG, Klioutchnikov G, Komatsu M, Konovalova N, Kuleshov S, Lacker HM, Lantwin O, Lasagni Manghi F, Lauria A, Lee KY, Lee KS, Lee WC, Loschiavo VPet al., 2025,

    Studies of hadronic showers in SND@LHC

    , Journal of Instrumentation, Vol: 20

    The SND@LHC experiment was built for observing neutrinos arising from LHC pp collisions. The detector consists of two sections: a target instrumented with SciFi modules and a hadronic calorimeter/muon detector. Energetic νN collisions in the target produce hadronic showers. Reconstruction of the shower total energy requires an estimate of the fractions deposited in both the target and the calorimeter. In order to calibrate the SND@LHC response, a replica of the detector was exposed to hadron beams with 100 to 300 GeV in the CERN SPS H8 test beam line in Summer 2023. This report describes the methods developed to tag the presence of a shower, to locate the shower origin in the target, and to combine the target SciFi and the calorimeter signals so to measure the shower total energy.
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Aleksiejunas R, Alessio F, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreola P, Andreotti M, Andres Estrada S, Anelli A, Ao D, Arata C, Archilli F, Areg Z, Argenton M, Arguedas Cuendis S, Arnone L, Artamonov A, Artuso M, Aslanides E, Ataíde Da Silva R, Atzeni M, Audurier B, Authier JA, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Balboni A, Baldini W, Baldwin Z, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartz J, Bashir S, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NA, Belin S, Bellavista A, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bezshyyko O, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti Aet al., 2025,

    Improved measurement of η/η′ mixing in Bs0→J/ψη′ decays

    , Journal of High Energy Physics, Vol: 2025

    Branching fraction ratios between the decays Bs0→J/ψη′ are measured using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb<sup>−1</sup>. The measured ratios of these branching fractions are (Formula presented.) where the uncertainties are statistical, systematic and related to the precision of the η<sup>(′)</sup> branching fractions, respectively. They are used to constrain the η/η′ mixing angle, ϕ<inf>P</inf>, and to probe the presence of a possible glueball component in the η′ meson, described by the gluonic mixing angle ϕ<inf>G</inf>. The obtained results are (Formula presented.) where the uncertainties are statistically dominated. While the value of ϕ<inf>P</inf> is compatible with existing experimental determinations and theoretical calculations, the angle ϕ<inf>G</inf> differs from zero by more than four standard deviations, which points to a substantial glueball component in the η′ meson and/or unexpectedly large contributions from gluon-mediated processes in these decays. The absolute branching fractions are also measured relative to that of the well-established Bs0→J/ψϕ decay, which serves as the normalisation channel. These results supersede the previous LHCb measurements and are the most precise to date.

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