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HK: Fachverband Physik der Hadronen und Kerne
HK 40: Heavy-Ion Collisions and QCD Phases VI
HK 40.5: Vortrag
Donnerstag, 19. März 2026, 17:15–17:30, PHIL C 601
Study of neutral meson production in Pb–Pb collisions at √sNN = 5.36 TeV as a function of centrality — •Anna Pishchaeva for the ALICE Germany collaboration — Physikalisches Institut, Universität Heidelberg
Photons that are produced throughout the spacetime evolution of quark-gluon plasma (QGP) are an ideal probe to study its characteristics, since they do not interact with the medium. To access the information carried by the photons that come directly from QGP, one must subtract the background of photons from neutral mesons decays (mainly π0, η). Furthermore, the energy loss of partons traversing the QGP medium in the high pT region can be studied with a nuclear modification factor of π0 and η.
In this cut based analysis, photons are reconstructed using the photon conversion method (PCM). Neutral pions and η mesons are identified as peaks in the two-photon invariant mass at their corresponding rest mass. This talk presents results for Run 3 on the neutral pions and η meson production in Pb–Pb collisions at √sNN = 5.36 TeV. The obtained invariant differential yields of π0 and η in the current analysis are presented and compared to charged pions at √sNN = 5.02 TeV.
Keywords: ALICE; Neutral mesons; Corrected yield; Photon conversion