Citation

BibTex format

@article{Alberte:2021:10.1103/PhysRevD.103.125020,
author = {Alberte, L and de, Rham C and Jaitly, S and Tolley, AJ},
doi = {10.1103/PhysRevD.103.125020},
journal = {Physical Review D: Particles, Fields, Gravitation and Cosmology},
pages = {1--26},
title = {QED positivity bounds},
url = {http://dx.doi.org/10.1103/PhysRevD.103.125020},
volume = {103},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We apply positivity bounds directly to a U(1) gauge theory with charged scalars and charged fermions, i.e., QED, minimally coupled to gravity. Assuming that the massless t-channel pole may be discarded, we show that the improved positivity bounds are violated unless new physics is introduced at the parametrically low scale Λnew∼(emMPl)1/2, consistent with similar results for scalar field theories, far lower than the scale implied by the weak gravity conjecture. This is sharply contrasted with previous treatments which focus on the application of positivity bounds to the low energy gravitational Euler-Heisenberg effective theory only. We emphasize that the low cutoff is a consequence of applying the positivity bounds under the assumption that the pole may be discarded. We conjecture an alternative resolution that a small amount of negativity, consistent with decoupling limits, is allowed and is not in conflict with standard UV completions, including weakly coupled ones.
AU  - Alberte,L
AU  - de,Rham C
AU  - Jaitly,S
AU  - Tolley,AJ
DO  - 10.1103/PhysRevD.103.125020
EP  - 26
PY  - 2021///
SN  - 1550-2368
SP  - 1
TI  - QED positivity bounds
T2  - Physical Review D: Particles, Fields, Gravitation and Cosmology
UR  - http://dx.doi.org/10.1103/PhysRevD.103.125020
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000664530200020&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.103.125020
UR  - http://hdl.handle.net/10044/1/92075
VL  - 103
ER  -
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