PoS - Proceedings of Science
Volume 380 - Particles and Nuclei International Conference 2021 (PANIC2021) - Hot and dense matter physics - QGP and heavy ion collisions
Systematic study of energy loss in the quark-gluon plasma at RHIC-PHENIX
M. Shibata* and  On behalf of the PHENIX collaboration
Full text: pdf
Pre-published on: March 10, 2022
Published on:
This article discusses an estimation of the energy loss of partons in QGP in various collision systems using PHENIX data. We study the energy loss by two different methods, the fractional momentum losses $S_{\rm loss}=(p_{\rm T}^{\rm pp}-p_{\rm T}^{\rm AA})/p_{\rm T}^{\rm pp}$ and $S'_{\rm loss}=(p_{\rm T}^{\rm AA,in}-p_{\rm T}^{\rm AA,out})/p_{\rm T}^{\rm AA,in}$. $S_{\rm loss}$ is obtained by comparing the inclusive $p_{\rm T}$ spectra in the AA and pp collisions. In contrast, $S'_{\rm loss}$ is obtained by comparing in-plane and out-of-plane spectra using azimuthal anisotropy $v_{2}$. These quantities are extracted from the data in AuAu, CuAu, and CuCu collisions at $\sqrt{s_{\rm NN}} = 200$ GeV for $\pi^0$s, and the AuAu collisions at $\sqrt{s_{\rm NN}} = 200$ GeV for charged hadrons. The results show that $S_{\rm loss}$ is almost constant for a given centrality and does not depend on $p_{\rm T}$. In addition, $S_{\rm loss}$ is proportional to the squared path-length of the parton in the reaction area. In contrast, the results show that $S'_{\rm loss}$ slightly decreases up to $p_{\rm T}\sim 6$ GeV and is almost constant at higher $p_{\rm T}$ for a given centrality class. In addition, unlike $S_{\rm loss}$, $S'_{\rm loss}$ is not proportional to the difference of squared path-length in-plane and out-of-plane in the reaction area.
DOI: https://doi.org/10.22323/1.380.0249
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.