English

Direct photon $p_{\rm T}$ spectra and correlations measured with ALICE

Nuclear Experiment 2023-12-18 v1 High Energy Physics - Experiment

Abstract

This contribution discusses the measurements of direct photons in pp and Pb--Pb collisions from the LHC Run 2, as recorded by the ALICE experiment. Specifically, we focus on the isolated photons results obtained at sNN\sqrt{s_{\rm NN}} = 5.02 TeV. The isolated photons γiso\gamma^{\rm iso} spectra in pp and Pb--Pb collisions are presented together with the nuclear modification factor, that is found to be consistent with unity. The azimuthal correlations of γiso\gamma^{\rm iso} with hadrons in Pb--Pb and the hadronzTz_{\rm T} distributions D(zT)D(z_{\rm T}) are presented, showing a centrality-dependent suppression compared to the pQCD NLO pp reference.

Keywords

Cite

@article{arxiv.2312.09644,
  title  = {Direct photon $p_{\rm T}$ spectra and correlations measured with ALICE},
  author = {Carolina Arata},
  journal= {arXiv preprint arXiv:2312.09644},
  year   = {2023}
}

Comments

4 pages, 2 figures. Proceedings of Quark Matter 2023 - XXXth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions, Houston, TX, 3-9 September 2023