Quenching of hadron spectra in XeXe and PbPb collisions at the LHC
| Autor: | Arleo, François, Falmagne, Guillaume |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | PoS(HardProbes2018)075 |
| Druh dokumentu: | Working Paper |
| Popis: | The $p_\perp$ dependence of the nuclear modification factor $R_{\text{AA}}$ measured in PbPb collisions at the LHC exhibits a universal shape, which can be very well reproduced in a simple energy loss model based on the BDMPS medium-induced gluon spectrum. We update a former study by including in the analysis the recent CMS measurements on $J/\psi$ production in PbPb collisions at $\sqrt{s}=5.02$ TeV and charged hadron production in XeXe collisions at $\sqrt{s}=5.44$ TeV. The average parton energy loss extracted from minimum bias XeXe collisions is reduced typically by 20% compared to PbPb collisions, consistent with a length dependence $\langle\bar{\epsilon}\rangle \propto L^{1.3\pm0.5}$ with $L\propto A^{1/3}$. Comment: 4 pages, 2 figures. Proceedings of the Hard Probes 2018 conference |
| Databáze: | arXiv |
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