Observation of the Bc+→ J/ψ π+ π0 - Aaij, R; Abdelmotteleb, ASW; Beteta, CA; Abudinen, F; Ackernley, T; Adams, JA; Adefisoye, AA; Adeva, B; Adinolfi, M; Adlarson, P; Agapopoulou, C; Aidala, CA; et al. (JOURNAL OF HIGH ENERGY PHYSICS, 2024)