Low-p.sub.T./sub. direct-photon production in Au + Au collisions at √s.sub.NN./sub. = 39 and 62.4 GeV

0574912 - FZÚ 2024 RIV US eng J - Journal Article
Abdulameer, N.J. - Acharya, U. - Adare, A. - Tomášek, Lukáš - Tomášek, Michal - Vrba, Václav … Total 434 authors
Low-p_T direct-photon production in Au + Au collisions at √s_NN = 39 and 62.4 GeV.
Physical Review C. Roč. 107, č. 2 (2023), č. článku 024914. ISSN 2469-9985. E-ISSN 2469-9993
Institutional support: RVO:68378271
Keywords : scaling * PHENIX * experimental results * 39: 62.4 GeV-cms/nucleon
OECD category: Particles and field physics
Impact factor: 3.1, year: 2022
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevC.107.024914

The measurement of direct photons from Au+Au collisions at sNN=39 and 62.4 GeV in the transverse-momentum range 0.4<pT<3Gev/c is presented by the PHENIX collaboration at the BNLRelativistic Heavy Ion Collider. A significant direct-photon yield is observed in both collision systems. A universal scaling is observed when the direct-photon pT spectra for different center-of-mass energies and for different centrality selections at sNN=62.4 GeV is scaled with (dNch/dη)α for α=1.21±0.04. This scaling also holds true for direct-photon spectra from Au+Au collisions at sNN=200 GeV measured earlier by PHENIX, as well as the spectra from Pb+Pb at sNN=2760 GeV published by ALICE.
Permanent Link: https://hdl.handle.net/11104/0350509