Two Topics in b Physics

1996/04/15 by Jonathan L. Rosner, Rosner, Jonathan L.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9604319

11 pages, latex, no figures. Presented at 10th La Thuile Rencontre. DESY preprint no. corrected in heading

openalex publication_date 1996/04/15 · arxiv created 1996/04/16 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

(1) A simple transversity analysis permits one to separate the P-even and P-odd partial waves in such decays as B_s → J/ψϕ and B → J/ψK^*. This method is relevant to the separation of contributions of CP-even and CP-odd final states in B_s decays, and hence to the measurement of a possible lifetime difference between mass eigenstates. (2) The enhancement ΔΓ(Λ_b) of the Λ_b decay rate due to four-fermion processes is calculated in terms of the Σ_b^* - Σ_b hyperfine splitting, the B^* - B hyperfine splitting, and the B meson decay constant f_B. Despite a relatively large hyperfine splitting observed by the DELPHI Collaboration, the mechanism falls far short of being able to explain the observed enhancement.

Related

• B Physics Overview: Rare Hadronic and Radiative Decays
• Physics with B → η' and B→ J/ψ
• B Decays, an Introductory Survey
• Determination of the Sign of the Decay Width Difference in theBs0System
• Hadronic Effects in Two-Body B decays