Input from the charm threshold for the measurement of $\gamma$

TL;DR

This paper reviews how measurements at the charm threshold, especially four-body decay states of D0 mesons, contribute to accurately determining the Unitarity Triangle angle gamma in particle physics.

Contribution

It introduces new measurements of four-body D0 decay modes that were not previously considered, enhancing the inputs for gamma determination.

Findings

Measured D0→K_S^0 π^+ π^- π^0 decay mode

Measured D0→π^+ π^- π^+ π^- decay mode

Improved inputs for gamma measurement

Abstract

A brief overview of the inputs from charm threshold that are essential to the determination of the Unitarity Triangle angle $\gamma$ is presented. The focus is on the measurements of four-body final states that have not previously been considered: $D^0\to K_{\rm S}^0 \pi^+ \pi^- \pi^0 $ and $D^0 \to \pi^+ \pi^- \pi^+ \pi^-$.