Measurement of the $\Omega_c^0$ Lifetime

TL;DR

This paper reports a precise measurement of the $oxed{ ext{Omega}_c^0}$ baryon's lifetime using specific decay channels, significantly improving the accuracy of previous measurements and contributing valuable data to charm baryon studies.

Contribution

The study provides the first measurement of the $oxed{ ext{Omega}_c^0}$ lifetime with improved precision, using two decay channels and a novel analysis approach.

Findings

Measured $oxed{ ext{Omega}_c^0}$ lifetime as 72 ± 11 (stat.) ± 11 (sys.) fs.

Used two decay channels to enhance measurement accuracy.

Significantly improved the world average of the $oxed{ ext{Omega}_c^0}$ lifetime.

Abstract

The FOCUS experiment(FNAL-E831) has used two channels, $\Omega^- \pi^+$ and $\Xi^-K^- \pi^+ \pi^+$,to measure the lifetime of the $\Omega_c^0$ charmed baryon. From a sample of $64 \pm 14$ signal events at a mass of 2.698 GeV/$c^2$, we measure an $\Omega_c^0$ lifetime of $72 \pm 11$ (stat.) $\pm 11$ (sys.) fs, substantially improving upon the current world average.