Jet quenching parameter in QCD kinetic theory
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866911019828248576 |
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| author | Boguslavski, Kirill Kurkela, Aleksi Lappi, Tuomas Lindenbauer, Florian Peuron, Jarkko |
| author_facet | Boguslavski, Kirill Kurkela, Aleksi Lappi, Tuomas Lindenbauer, Florian Peuron, Jarkko |
| contents | We study the jet quenching parameter $\hat q$ in a non-equilibrium plasma using the QCD effective kinetic theory. We discuss subleading terms at large jet momentum p, show that our expression for $\hat q$ reproduces thermal results at small and large transverse momentum cutoffs for infinite p and construct an interpolation between these limits to be used in phenomenological applications. Using simple non-equilibrium distributions that model pertinent features of the bottom-up thermalization scenario, we analytically assess how anisotropy, under- or overoccupation affect the jet quenching parameter. Our work provides more details on the $\hat q$ formula used in our preceding work [arXiv:2303.12595] and sets the stage for further numerical studies of jet momentum broadening in the initial stages of heavy-ion collisions from QCD kinetic theory. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_00447 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Jet quenching parameter in QCD kinetic theory Boguslavski, Kirill Kurkela, Aleksi Lappi, Tuomas Lindenbauer, Florian Peuron, Jarkko High Energy Physics - Phenomenology Nuclear Theory We study the jet quenching parameter $\hat q$ in a non-equilibrium plasma using the QCD effective kinetic theory. We discuss subleading terms at large jet momentum p, show that our expression for $\hat q$ reproduces thermal results at small and large transverse momentum cutoffs for infinite p and construct an interpolation between these limits to be used in phenomenological applications. Using simple non-equilibrium distributions that model pertinent features of the bottom-up thermalization scenario, we analytically assess how anisotropy, under- or overoccupation affect the jet quenching parameter. Our work provides more details on the $\hat q$ formula used in our preceding work [arXiv:2303.12595] and sets the stage for further numerical studies of jet momentum broadening in the initial stages of heavy-ion collisions from QCD kinetic theory. |
| title | Jet quenching parameter in QCD kinetic theory |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2312.00447 |