CP violation induced by neutral meson mixing interference

Author:

Shen Yin-Fa1ORCID,Song Wen-Jie1,Qin Qin1ORCID

Affiliation:

1. Huazhong University of Science and Technology

Abstract

We investigate a long-overlooked CP violation effect—the double-mixing CP asymmetry—in a type of cascade decay that involves at least two mixing neutral mesons in the decay chain. It is induced by the interference between different oscillation paths of the neutral mesons in the decay process. The double-mixing CP asymmetry is of critical importance for phenomenology, providing opportunities for clean determination of Cabibbo-Kobayashi-Maskawa phase angles free of uncertainties induced by the strong dynamics. To illustrate this point, we perform a phenomenological analysis on two examples: Bs0ρ0Kρ0(π+ν) and B0D0KD0(π+ν¯). Our results demonstrate that the double-mixing CP asymmetry can be numerically significant in the absence of strong phases, as shown by the former example. Additionally, the latter example showcases a direct extraction of weak and strong phases from data, without the need for theoretical inputs. Published by the American Physical Society 2024

Funder

National Natural Science Foundation of China

Publisher

American Physical Society (APS)

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