Электронный каталог

Статья

Acharya, S.
Measurement of the Inclusive Isolated-Photon Production Cross Section in pp and Pb-Pb Collisions at *%s&sub(NN)=5.02 TeV / S.Acharya, B.Batyunya, R.A.Diaz, S.Grigoryan, A.Kondratyev, A.Kuznetsov, L.Malinina, K.Mikhaylov, P.Nomokonov, V.Pozdniakov, E.Rogochaya, A.Vodopyanov, [ALICE Collab.]. – Text : electronic // The European Physical Journal C. – 2025. – Vol. 85, No. 5. – P. 553. – URL: https://doi.org/10.1140/epjc/s10052-025-13971-y. – Bibliogr.: 96.

The ALICE Collaboration at the CERN LHC has measured the inclusive production cross section of isolated photons at midrapidity as a function of the photon transverse momentum (p&sup(γ)&sub(T)), in Pb–Pb collisions in different centrality intervals, and in pp collisions, at centre-of-momentum energy per nucleon pair of √sNN = 5.02 TeV. The photon transverse momentum range is between 10–14 and 40–140 GeV/c, depending on the collision system and on the Pb–Pb centrality class. The result extends to lower p&sup(γ)&sub(T) than previously published results by the ATLAS and CMS experiments at the same collision energy. The covered pseudorapidity range is |η&sup(γ)|< 0.67. The isolation selection is based on a charged particle isolation momentum threshold p&sup(iso,ch)&sub(T)= 1.5 GeV/c within a cone of radii R = 0.2 and 0.4. The nuclear modification factor is calculated and found to be consistent with unity in all centrality classes, and also consistent with the HG-PYTHIA model, which describes the event selection and geometry biases that affect the centrality determination in peripheral Pb–Pb collisions. The measurement is compared to next-to-leading order perturbative QCD calculations and to the measurements of isolated photons and Z*0 bosons from the CMS experiment, which are all found to be in agreement



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 343 е2 - Взаимодействие релятивистских ядер с ядрами