EPJ Web Conf.
Volume 222, 2019The XXIV International Workshop “High Energy Physics and Quantum Field Theory” (QFTHEP 2019)
|Number of page(s)||8|
|Section||Experiment / Detectors / Data analysis|
|Published online||19 November 2019|
Direct photon production in pp, p-Pb and Pb-Pb collisions: results from ALICE
NRC “Kurchatov Institute”,
Kurchatov sq. 1,
* e-mail: email@example.com
Published online: 19 November 2019
Direct photon measurements provide a tool for testing QCD predictions in pp collisions and valuable information about properties of the quarkgluon matter created in nucleus-nucleus collisions. Comparing direct photon production in pp, p-Pb and Pb-Pb collisions, one can check the scaling with the number of binary collisions expected at high transverse momentum and get insight into the hot and cold hadronic matter properties with soft photons. The elliptic flow of direct photons is another unique possibility to trace the collective flow formation and space-time evolution of the fireball.
We present the latest measurements of direct photon production in pp, p-Pb and Pb-Pb collisions and of the elliptic flow in Pb-Pb collisions at the LHC energies. Comparison to recent theory predictions will be also discussed.
© 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, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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