Inputs for the $\gamma$ measurements from BESIII

TL;DR

This paper discusses the use of BESIII data to improve the precision of CKM angle gamma measurements by providing essential strong phase information from charm decays, aiding in testing the Standard Model.

Contribution

It introduces methods to utilize BESIII's quantum-correlated data to reduce uncertainties in gamma extraction from B decays.

Findings

BESIII data enhances gamma measurement accuracy.

Quantum correlations suppress charm sector uncertainties.

Improved constraints on CKM matrix unitarity.

Abstract

The CKM angle $\gamma$ is important for testing the unitarity of the CKM matrix and searching for new physics. $\gamma$ can be extracted by the interference between $b\to u$ and $b\to c$ in the B factory such as LHCb and Belle-II. Determining $\gamma$ also needs strong parameter information from the charm factory, such as the BESIII experiment. With quantum-correlated data samples collected at BESIII, the $\gamma$ uncertainties from the charm sector can be highly suppressed.