Speaker
Description
In any relativistic quantum field theory, such as quantum chromodynamics or electroweak theory, the interactions are invariant under the combined operation of charge conjugation (C), parity transformation (P) and time reversal (T). One of the consequences of this (CPT) symmetry is that particles and their corresponding antiparticles must have exactly the same mass. While the mass difference between proton and antiproton has been measured with very high precision, the extension to the (multi-)strange baryon domain still lacks precise measurements.
In this contribution, the most precise measurement of mass differences between $\Xi^{-}$ and $\overline{\Xi}^{+}$, and between $\Omega^{-}$ and $\overline{\Omega}^{+}$ using the ALICE detector will be presented, improving the precision obtained by averaging the results from previous experiments.
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