Semileptonic B^-→π⁺π^-ℓ^-ν_ℓ decay with ππ invariant mass spectrum

2021/07/08 by Shang-Yuu Tsai, Tsai, Shang-Yuu, Y. K. Hsiao +1
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 Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2107.03634

openalex publication_date 2021/07/08 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28

Abstract

BELLE has recently reported the measurement of the branching fraction of the semileptonic B^-→π⁺π^-ℓ^-ν_ℓ decay, where ℓ represents an electron or a muon. With the new information on the ππ invariant mass spectrum, we extract |V_ub|=(3.31± 0.61)× 10^-3 in agreement with those from the other exclusive B decays. In particular, we determine the non-resonant B→ππ transition form factors, and predict the non-resonant branching fraction \cal B(B^-→π⁺π^-ℓ^-ν_ℓ)=(3.5± 1.4^+4.3_-2.4)× 10^-5, which is accessible to the BELLEII and LHCb experiments.

Related

• Measurement of Exclusive B → X_u ℓ ν Decays with D^(*) ℓ ν Decay Tagging
• New results on semileptonic B decays from the Belle experiment
• Measurement of the inclusive semileptonic B meson branching fraction in 62.8 fb^-1 of Belle II data
• Exclusive B → X_u ℓ ν_ℓ Decays with Hadronic Full-event-interpretation Tagging in 62.8 fb^-1 of Belle II Data
• Probing Lepton Universality with (Semi)-Leptonic B decays