2022/11/04 by Alexander Lenz, Lenz, Alexander, Jakob R. Müller +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2211.02724
openalex publication_date 2022/11/04 · openalex created_date 2022/11/13 · openalex updated_date 2026/07/28
Inspired by the recently observed tensions between the experimental data and the theoretical predictions, based on QCD factorisation, for several colour-allowed non-leptonic B-meson decays, we study the potential size of new physics (NP) effects in the decay channels b → c u d(s). Starting from the most general effective Hamiltonian describing the b → c u d(s) transitions, we compute NP contributions to the theoretical predictions of B-meson lifetime and of B-mixing observables. The well-known lifetime ratio τ(B+)/τ(Bd) and the experimental bound on the semi-leptonic CP asymmetry asld, provide strong, complementary constraints on some of the NP Wilson coefficients.