Analysis of localized CP asymmetry in B_s⁰ → π⁺π^-π⁰(K⁰)

2022/09/18 by Zhao, Yan-Lin, Lü, Gang, Na-Wang +1
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2209.08550

Abstract

An investigation about localized CP asymmetries for the processes of B_s⁰ → π⁺π^-π⁰ (K⁰) is presented in this paper. The innovation of this paper is that there is a consideration of three-particle ρ⁰(770), ω(782) and ϕ(1020) interferences effect. Generally, ω(782) and ϕ(1020) both can decay into π⁺π^- pair where can cause extremely small contribution from isospin symmetry breaking. Nevertheless, our analysis shows that B_s⁰ → π⁺π^-π⁰(K⁰) decay process can bring differential CP asymmetry about 65% (36%) because of isospin symmetry breaking. To better compared with the data from experimental in the future, we integrate CP asymmetry over the invariant mass and obtain localized CP asymmetry value for the decay B_s⁰ → π⁺π^-π⁰ (K⁰). We find that there is an evident signal about CP asymmetry at invariant mass value m(π⁺π^-) below the mass of ρ(770)⁰ with the decay B_s⁰ → π⁺π^-π⁰.

Related

• Hunting for direct CP violation in B_s⁰ → π⁺π^-K^*0
• CP asymmetry from the effect of the isospin symmetry breaking during B-meson decay
• Understanding large localized CP violation in B^±→ K^±π⁺π^- using dispersive methods
• The role and contribution of resonance effect for the decay process of B⁰_s → π⁺π^-P
• CP asymmetry from resonance effect of B meson decay process with π and K final states