Testing CPT symmetry via precision mass measurements of multi-strange baryons in ALICE

TL;DR

This paper reports high-precision measurements of multi-strange baryon masses and their differences in proton-proton collisions, providing stringent tests of CPT symmetry at an unprecedented level.

Contribution

It presents the most precise measurements to date of multi-strange baryon masses and mass differences, enabling improved CPT symmetry tests.

Findings

Mass measurements with significantly improved precision.

No observed CPT violation within experimental uncertainties.

Enhanced constraints on CPT symmetry in the multi-strange baryon sector.

Abstract

In these proceedings, the measurements of the $\Xi^-$, $\overline{\Xi}^+$, $\Omega^-$, $\overline{\Omega}^+$ masses and the mass differences between particle and anti-particle have been measured in pp collisions collected by the ALICE Collaboration during LHC Run 2. The results significantly improve the precision from previous experiments, thus allowing direct tests of CPT symmetry to an unprecedented level of precision in the multi-strange baryon sector.