Szczegóły publikacji
Opis bibliograficzny
Photoproduction of low-$p_{T}$ $J/\psi$ from peripheral to central Pb–Pb collisions at 5.02 TeV / S. Acharya, [et al.], B. BALIŚ, [et al.], M. GORGOŃ, [et al.], A. HORZYK, [et al.], M. JABŁOŃSKI, [et al.], J. P. KITOWSKI, [et al.], S. D. KORYCIAK, [et al.], P. G. RUSSEK, [et al.] // Physics Letters . B ; ISSN 0370-2693. — 2023 — vol. 846 art. no. 137467, s. 1–14. — Bibliogr. s. 7–8, Abstr. — Publikacja dostępna online od: 2023-09-17
Autorzy (1033)
Dane bibliometryczne
| ID BaDAP | 149241 |
|---|---|
| Data dodania do BaDAP | 2023-10-09 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.physletb.2022.137467 |
| Rok publikacji | 2023 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Physics Letters, B |
Abstract
An excess of J/ψ yield at very low transverse momentum (pT < 0.3 GeV/c), originating from coherent photoproduction, is observed in peripheral and semicentral hadronic Pb–Pb collisions at a center-ofmass energy per nucleon pair of √sNN = 5.02 TeV. The measurement is performed with the ALICE detector via the dimuon decay channel at forward rapidity (2.5 < y < 4). The nuclear modification factor at very low pT and the coherent photoproduction cross section are measured as a function of centrality down to the 10% most central collisions. These results extend the previous study at √sNN = 2.76 TeV, confirming the clear excess over hadronic production in the pT range 0 − 0.3 GeV/c and the centrality range 70–90%, and establishing an excess with a significance greater than 5σ also in the 50–70% and 30–50% centrality ranges. The results are compared with earlier measurements at √sNN = 2.76 TeV and with different theoretical predictions aiming at describing how coherent photoproduction occurs in hadronic interactions with nuclear overlap.
