(NA61/SHINE Collaboration) Aduszkiewicz, A.; Antičić, Tome; Kadija, Krešo; Šuša, Tatjana; Zwaska, R. (2020) Two-particle correlations in azimuthal angle and pseudorapidity in central ^7hbox {;Be};+{;};^9hbox {;Be}; collisions at the CERN Super Proton Synchrotron. European physical journal C : particles and fields, 80 (12). ISSN 1434-6044
|
PDF
- Published Version
- article
Available under License Creative Commons Attribution. Download (7MB) | Preview |
Abstract
A measurement of charged hadron pair correlations in two-dimensional ΔηΔϕ space is presented. The analysis is based on total 30 million central Be + Be collisions observed in the NA61/SHINE detector at the CERN SPS for incident beam momenta of 19A, 30A, 40A, 75A, and 150A GeV/c. Measurements were carried out for unlike-sign and like-sign charge hadron pairs independently. The C(Δη, Δϕ) correlation functions were compared with results from a similar analysis on p + p interactions at similar beam momenta per nucleon. General trends of the back-to-back correlations are similar in central Be + Be collisions and p + p interactions, but are suppressed in magnitude due to the increased combinatorial background. Predictions from the Epos and UrQMD models are compared to the measurements. Evolution of an enhancement around (Δη, Δϕ)=(0, 0) with incident energy is observed in central Be + Be collisions. It is not predicted by both models and almost non-existing in proton–proton collisions at the same momentum per nucleon.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | quark-gluon plasma ; angular-correlations ; rapidity ; dependence ; collisions |
| Subjects: | NATURAL SCIENCES > Physics |
| Divisions: | Division of Experimental Physics |
| Depositing User: | Tatjana Šuša |
| Date Deposited: | 15 Apr 2022 10:20 |
| URI: | http://fulir.irb.hr/id/eprint/7251 |
| DOI: | 10.1140/epjc/s10052-020-08675-4 |
Actions (login required)
 |
View Item |
Altmetric
Altmetric
