Inputs for the ${\hat{I}}^3$ measurements from BESIII

Abstract

The CKM angle ${\hat{I}}^3$ is important for testing the unitarity of the CKM matrix and searching for new physics. ${\hat{I}}^3$ 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 ${\hat{I}}^3$ also needs strong parameter information from the charm factory, such as the BESIII experiment. With quantum-correlated data samples collected at BESIII, the ${\hat{I}}^3$ uncertainties from the charm sector can be highly suppressed.

Presented at the 12th Workshop on the CKM Unitarity Triangle, 18-22 September 2023, Santiago de Compostela