Speaker
Description
ALICE at the LHC was designed to study the properties of Quantum Chromodynamics (QCD) from pp to heavy-ion collisions. In this context, the measurement of the $\Sigma^{0}$ baryon could serve as an additional test of isospin symmetry, which predicts the ratio of the yields of $\Sigma^{0}$ and $\Lambda$ baryons to be 1/3 according to their isospin projections. In addition, exploring this ratio across different systems could provide insights on the mechanisms behind the production of $\Sigma^{0}$ particles.
In this contribution, the measurements of the production yields of the $\Sigma^{0}$ baryon and its antiparticle are presented as a function of transverse momentum in pp collisions at $\sqrt{s}$ = 13.6 TeV with ALICE. This study reconstructs $\Sigma^{0}$ candidates via the electromagnetic decay $\Sigma^{0} \rightarrow \Lambda + \gamma$, exploiting the $ \Lambda \rightarrow \mathrm{p} + \pi$ decay channel and the Photon Conversion Method (PCM). The results are compared with different Monte Carlo generators and with $\Lambda$ baryon yields to test isospin symmetry. In addition, the first results of $\Sigma^{0}$ production in pO collisions at $\sqrt{s_{\rm NN}}$ = 9.62 TeV and Ne–Ne collisions at $\sqrt{s_{\rm NN}}$ = 5.36 TeV are presented.
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