Szczegóły publikacji
Opis bibliograficzny
Energy dependence of coherent photonuclear production of $J/\psi$ mesons in ultra-peripheral Pb-Pb collisions at $\sqrt{s_{NN}}$=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.], T. M. LELEK, [et al.], R. W. MARCJAN, [et al.], P. G. RUSSEK // The Journal of High Energy Physics [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 1029-8479. — 2023 — iss. 10 art. no. 119, s. [1], 1–40. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 27–32, Abstr. — Publikacja dostępna online od: 2023-10-20
Autorzy (1051)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 151571 |
|---|---|
| Data dodania do BaDAP | 2024-01-24 |
| Tekst źródłowy | URL |
| DOI | 10.1007/JHEP10(2023)119 |
| Rok publikacji | 2023 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | The Journal of High Energy Physics |
Abstract
The cross section for coherent photonuclear production of J/ψ is presented as a function of the electromagnetic dissociation (EMD) of Pb. The measurement is performed with the ALICE detector in ultra-peripheral Pb-Pb collisions at a centre-of-mass energy per nucleon pair of sNN = 5.02 TeV. Cross sections are presented in five different J/ψ rapidity ranges within |y| < 4, with the J/ψ reconstructed via its dilepton decay channels. In some events the J/ψ is not accompanied by EMD, while other events do produce neutrons from EMD at beam rapidities either in one or the other beam direction, or in both. The cross sections in a given rapidity range and for different configurations of neutrons from EMD allow for the extraction of the energy dependence of this process in the range 17 < Wγ Pb,n < 920 GeV, where Wγ Pb,n is the centre-of-mass energy per nucleon of the γPb system. This range corresponds to a Bjorken-x interval spanning about three orders of magnitude: 1.1 × 10 −5 < x < 3.3 × 10 −2. In addition to the ultra-peripheral and photonuclear cross sections, the nuclear suppression factor is obtained. These measurements point to a strong depletion of the gluon distribution in Pb nuclei over a broad, previously unexplored, energy range. These results, together with previous ALICE measurements, provide unprecedented information to probe quantum chromodynamics at high energies. [Figure not available: see fulltext.] © 2023, The Author(s).
