Szczegóły publikacji
Opis bibliograficzny
Measurement of the inclusive isolated-photon production cross section in pp and Pb–Pb collisions at $\sqrt{s_{NN}}$=5.02 TeV / S. Acharya, [et al.], B. BALIŚ, [et al.], [et al.], M. GORGOŃ, [et al.], A. HORZYK, [et al.], M. JABŁOŃSKI, [et al.], S. D. KORYCIAK, [et al.], T. M. LELEK, [et al.], E. M. MAJERZ, [et al.] R. W. MARCJAN, [et al.], D. K. PŁÓCIENNIK, [et al.], P. G. RUSSEK, [et al.], P. WIĄCEK, [et al.] // The European Physical Journal. C, Particles and Fields ; ISSN 1434-6044. — 2025 — vol. 85 iss. 5 art. no. 553, s. 1–35. — Bibliogr. s. 26–29, Abstr. — Publikacja dostępna online od: 2025-05-19
Autorzy (1067)
Dane bibliometryczne
| ID BaDAP | 160333 |
|---|---|
| Data dodania do BaDAP | 2025-06-21 |
| Tekst źródłowy | URL |
| DOI | 10.1140/epjc/s10052-025-13971-y |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | European Physical Journal, C |
Abstract
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^γ_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^γ_T than previously published results by the ATLAS and CMS experiments at the same collision energy. The covered pseudorapidity range is |η^γ|<0.67. The isolation selection is based on a charged particle isolation momentum threshold p^iso, ch_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 bosons from the CMS experiment, which are all found to be in agreement.
