Charm physics prospects at Belle II

TL;DR

Belle II aims to significantly enhance charm physics measurements, including mixing and CP violation, through increased data, improved detection, and innovative tagging methods, advancing understanding of CKM parameters.

Contribution

The paper presents the expected sensitivity improvements and introduces a novel flavour tagging method for charm meson studies at Belle II.

Findings

Projected 50-fold increase in data improves measurement precision.

Enhanced vertex detection and particle ID boost sensitivity.

New flavour tagging method increases D meson sample size.

Abstract

Belle II is a major upgrade of the Belle experiment and will operate at the $B$-factory SuperKEKB in Japan. Here we discuss the expected sensitivity of Belle II for $D^0 - \bar{D}^0$ mixing and $CP$ violation measurements in the charm sector, which will benefit from a factor 50 increase in statistics and an improved vertex detection and particle identification. The impact on the determination of CKM parameters from the measurements of purely leptonic $D$ mesons decays is discussed. Finally a novel method of flavour tagging to substantially increase the sample of $D^0$ and $\bar{D}^0$ is presented.