Jet quenching with $T$-dependent running coupling

Abstract

We perform an analysis of jet quenching in heavy ion collisions at RHIC and LHC energies with the temperature dependent running QCD coupling. Our results show that the $T$-dependent QCD coupling largely eliminates the difference between the optimal values of ${\alpha }_s$ for the RHIC and LHC energies. It may be viewed as direct evidence of the increase of the thermal suppression of ${\alpha }_s$ with rising temperature.

7 pages, 3 figures, accepted for publication in JETP Letters. arXiv admin note: text overlap with arXiv:2007.09772

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