Direct CP violation from isospin symmetry breaking effects in PQCD

2018/07/29 by Gang Lü, Lü, Gang, Qin-Qin Zhi +1
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1807.11917

openalex publication_date 2018/07/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We investigate the direct CP violation for the decay process of B_s→ P(V)π⁰ (P,V refer to the pseudoscalar meson and vector meson, respectively) via isospin symmetry breaking effects from the π⁰-η-η' mixing mechanism in PQCD factorization approach. Isospin symmetry breaking arises from the electroweak interaction and the u-d quark mass difference by the strong interaction which are known to be tiny. However, we find that isospin symmetry breaking at the leading order shifts the CP violation due to the new strong phases.

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