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Communication Dans Un Congrès Année : 2023

Study of a longitudinally expanding plasma with the 2PI effective action

Résumé

A central question in heavy-ion collisions is how the initial far-from-equilibrium medium evolves and thermalizes while it undergoes a rapid longitudinal expansion. In this work we use the two-particle irreducible (2PI) effective action for the first time to consider this question, focusing on $\phi^4$ scalar theory truncated at three loops. We calculate the momentum distribution of quasiparticles in the medium and show that isotropization takes place. We furthermore consider the thermal mass of quasiparticles and the importance of number-changing processes.

Dates et versions

hal-04372746 , version 1 (04-01-2024)

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François Gelis, Sigtryggur Hauksson. Study of a longitudinally expanding plasma with the 2PI effective action. 30th International Conference on Ultrarelativstic Nucleus-Nucleus Collisions, Sep 2023, Houston, United States. ⟨hal-04372746⟩
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