# Measurements of charm lifetimes at Belle II

## TL;DR

This paper presents the most precise measurements to date of charm hadron lifetimes using Belle II data, providing new insights into the properties of charmed baryons and their decay behaviors.

## Contribution

It reports the first high-precision lifetime measurements of $D^0$, $D^+$, and $\Lambda_c^+$ at Belle II, and clarifies the lifetime hierarchy of singly charmed baryons.

## Key findings

- Measured $D^0$, $D^+$, and $\Lambda_c^+$ lifetimes with unprecedented precision.
- Confirmed that $\Omega_c^0$ is not the shortest-lived singly charmed baryon.
- Results are consistent with previous measurements, refining the understanding of charm hadron decays.

## Abstract

We report on absolute lifetime measurements of charmed hadrons using the data collected by the Belle II experiment between 2019 and 2021. The measured lifetimes of $D^0$, $D^+$, and $\Lambda_c^+$ are the most precise to date and consistent with previous measurements. Our result indicates that $\Omega_c^0$ is not the shortest-living singly charmed baryon.