Naslov
Two-particle correlations in azimuthal angle and pseudorapidity in central 7Be+9Be collisions at the CERN Super Proton Synchrotron
(Two-particle correlations in azimuthal angle and pseudorapidity in central ^7hbox {;;Be};;+{;;};;^9hbox {;;Be};; collisions at the CERN Super Proton Synchrotron)

Autori
Aduszkiewicz, A. ; ... ; Antićić, Tome ; ... ; Kadija, Krešo ; ... ; Šuša, Tatjana ; ... ; Zwaska, R.

Kolaboracija
NA61/SHINE Collaboration

Izvornik
European physical journal C : particles and fields (1434-6044) 80 (2020), 12; 1151, 20

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
quark-gluon plasma ; angular-correlations ; rapidity ; dependence ; collisions

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA