| Issue |
EPJ Web Conf.
Volume 206, 2019
XLVIII International Symposium on Multiparticle Dynamics (ISMD 2018)
|
|
|---|---|---|
| Article Number | 02002 | |
| Number of page(s) | 9 | |
| Section | Perturbative and Non-Perturbative Features of QCD | |
| DOI | https://doi.org/10.1051/epjconf/201920602002 | |
| Published online | 19 April 2019 | |
https://doi.org/10.1051/epjconf/201920602002
Geometrical scaling of prompt photons in heavy ion collisions
M. Smoluchowski Institute of Physics, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland
* e-mail: michal@if.uj.edu.pl
Published online: 19 April 2019
We discuss geometrical scaling (GS) for the prompt (direct) photons produced in heavy ion collisions. To this end we first introduce the concept of GS and illustrate its emergence on the example of charged particles. Next, we analyse direct photon data from RHIC and from the LHC. We show that thedata supportthehypothesisofGSin termsof participant number relatedto different centrality classes. We also study GS at different energies, however a more detailed study will be possible only when data for at least three different energies from one experiment will be available and also when we use the data obtained from the collisions of large systems (Cu+Cu, Au+Au, Pb+Pb) and small systems (p+p,d+Au,p+Au).
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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