Study of a longitudinally expanding plasma with the 2PI effective action
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866910904612814848 |
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| author | Gelis, François Hauksson, Sigtryggur |
| author_facet | Gelis, François Hauksson, Sigtryggur |
| contents | 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 $ϕ^4$ 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2312_09749 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Study of a longitudinally expanding plasma with the 2PI effective action Gelis, François Hauksson, Sigtryggur High Energy Physics - Phenomenology Nuclear Theory 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 $ϕ^4$ 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. |
| title | Study of a longitudinally expanding plasma with the 2PI effective action |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2312.09749 |