2025/06/19 by Endo, Motoi, Iguro, Syuhei, Kretz, Tim +2
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum and Classical Electrodynamics
paper · pdf · doi:10.48550/arxiv.2506.16027
openalex publication_date 2025/06/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Lepton flavor universality is a key prediction of the Standard Model of particle physics and any violation of it immediately indicates the existence of new physics. Given the recent more than 4σ discrepancy in charged current semileptonic B meson decays and the absence of evident signals at the large hadron collider, independent cross-checks become invaluable. In this context, b → c semileptonic sum rules based on heavy quark symmetry are interesting since they allow us to check the consistency of experimental results. In this paper, we report newly found sum rules among angular observables of mesonic and baryonic b→ c l ν decays holding exactly in the large mass limit of heavy quarks. Moreover, we investigate corrections to the sum rule in realistic situations and discuss phenomenological implications.