Hunting for direct CP violation in B_s⁰ → π⁺π^-K^*0

2021/02/16 by Sheng-Tao Li, Gang Lü, Li, Sheng-Tao +1
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #High-Energy Particle Collisions Research

paper · pdf · doi:10.48550/arxiv.2102.07984

Abstract

In perturbative QCD approach, based on the first order of isospin symmetry breaking, we study the direct CP violation in the decay of B_s⁰→ρ(ω)K^*0→ π⁺π^-K^*0. An interesting mechanism is applied to enlarge the CP violating asymmetry involving the charge symmetry breaking between ρ and ω. We find that the CP violation is large by the ρ-ω mixing mechanism when the invariant masses of the π⁺π^- pairs is in the vicinity of the ω resonance. For the decay process of B⁰_s→ρ(ω)K^*0→π⁺π^-K^*0, the maximum CP violation can reach -59.12%. Furthermore, taking ρ-ω mixing into account, we calculate the branching ratio for B_s⁰ → ρ(ω) K^*0. We also discuss the possibility of observing the predicted CP violation asymmetry at the LHC.

Related

• Analysis of localized CP asymmetry in B_s⁰ → π⁺π^-π⁰(K⁰)
• Isospin symmetry breaking effects for the mode B→ ππ(K) in Perturbative QCD
• CP violation for B⁰→ ρ⁰(ω)ρ⁰(ω) → π⁺π^-π⁺π^- in QCD factorization
• CP Violation in B^±→ ρ⁰π^± and B^±→ σπ^± Decays
• Estimating of CP Violation in B_c→ B K⁰+B K⁰→ B π^± e^∓ ν_e Decays