全国第十八届重味物理和CP破坏研讨会（HFCPV 2021）

$\rho-\omega$ mixing contribution to the measured CP asymmetry of $B^\pm\to\omega K^\pm$

Not scheduled

15m

暨南大学

Speaker

Mr sheng yang (student)

Description

We study the CP asymmetry of $B^\pm\to\omega K^\pm$ with the inclusion of the $\rho-\omega$ mixing mechanism. It is shown that the CP asymmetry of $B^\pm\to\omega K^\pm$ experimentally measured $(A_{CP}^{exp})$ and conventionally defined $(A_{CP}^{con})$ are in fact different, which relation can be illustrated as $A_{CP}^{exp}=A_{CP}^{con}+\Delta A_{CP}^{\rho\omega}$, with $\Delta A_{CP}^{\rho\omega}$ the $\rho-\omega$ mixing contribution to $A_{CP}^{exp}$. The numerical value of $\Delta A_{CP}^{\rho\omega}$ is extracted from the experimental data of $B^\pm\to\pi^+\pi^- K^\pm$ and is found to be comparable with $A_{CP}^{exp}$, hence, non-negligible. The conventionally defined CP asymmetry, $A_{CP}^{con}$, is obtained from the value of $A_{CP}^{exp}$ and $\Delta A_{CP}^{\rho\omega}$, and is compared with the theoretical calculations in the literature.