Strangeness in Quark Matter 2024 (SQM 2024)

Phenomenology of Identified Particle Spectra in Heavy-Ion Collisions at LHC Energies

4 juin 2024, 19:11

1m

Hall Schweitzer, ground floor (PMC)

Poster Light-flavours and Strangeness Posters

Orateur

Oleksandr Vitiuk (University of Wroclaw)

Description

The Zubarev approach of the non-equilibrium statistical operator [1] is used to account for the enhancement of the low-$p_T$ part of pion spectra by introducing an effective pion chemical potential [2]. This is an alternative to the explanation of the low-$p_T$ enhancement by resonance decays. We report on first results obtained with a newly developed thermal particle generator that implements both mechanisms of low-$p_T$ enhancement and applies Bayesian inference methods for these scenarios to find the most probable sets of thermodynamic parameters at the freeze-out hypersurface for the case of the transverse momentum spectra of identified particles measured by the ALICE Collaboration [3]. The Bayes factor is determined for these scenarios. The advantages and limitations of the Zubarev approach are discussed.

References:
[1] D.N. Zubarev, V.G. Morozov and G. Röpke, Statistical Mechanics of Nonequilibrium Processes, Akademie Verlag Berlin (1996), vol. I
[2] D. Blaschke et al., Particles 3, 380–393 (2020)
[3] B. Abelev et al., Phys. Rev. C 88, 044910 (2013)

Documents de présentation

Poster_SQM_Vitiuk_Zubarev.pdf