Branching ratio and CP-asymmetry of Bs→ρ(ω)K decays in the perturbative QCD approach

2006/08/20 by Zhen-Jun Xiao, Zhen-jun Xiao, Xin-Fen Chen +3 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph

paper · pdf · doi:10.1140/epjc/s10052-007-0209-7

published as Eur.Phys.J.C50:363-371,2007 · 21 pages, 6 ps/eps figures, Revtex

arxiv created 2006/08/20 · openalex publication_date 2007/02/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

In this paper, we calculate the branching ratios and CP-violating asymmetries for B_s→ ρ^± K^∓, B_s→ρ⁰K⁰ and B_s→ωK⁰ decays in the perturbative QCD (pQCD) factorization approach. The theoretical predictions for the CP averaged branching ratios of the considered decays are: Br(B_s→ρ^± K^∓)≈ 24.7 × 10^-6, Br(B_s→ρ⁰K⁰) ≈ 1.2 × 10^-7 and Br(B_s →ωK⁰) ≈ 1.7 × 10^-7; and we also predict very large direct CP-violating asymmetries for the latter two decay modes: A_CP^dir(ρ^± K^∓)≈ -12 %, A_CP^dir(ρ⁰K⁰)≈ -92%, A_CP^dir(ω⁰K⁰)≈ 81%, A_CP^mix(ρ⁰K⁰)≈ -36%, and A_CP^mix(ω⁰K⁰) ≈ -40%, which can be tested in the forthcoming LHC-b experiments.

Citations

• Study ofBs→πρdecays in the perturbative QCD approach
• QCD Factorization forB→ππDecays: Strong Phases andCPViolation in the Heavy Quark Limit
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)

Cited by

• Light scalar mesons and charmless hadronicBc→SP,SVdecays in the perturbative QCD approach
• Charmless nonleptonicBsdecays toPP,PV, andVVfinal states in the perturbative QCD approach