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Two-particle correlations in azimuthal angle and pseudorapidity in central Formula omitted collisions at the CERN Super Proton Synchrotron
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Two-particle correlations in azimuthal angle and pseudorapidity in central Formula omitted collisions at the CERN Super Proton Synchrotron
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Two-particle correlations in azimuthal angle and pseudorapidity in central Formula omitted collisions at the CERN Super Proton Synchrotron
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Journal Article
Two-particle correlations in azimuthal angle and pseudorapidity in central Formula omitted collisions at the CERN Super Proton Synchrotron
2020
Overview
A measurement of charged hadron pair correlations in two-dimensional [Formula omitted] 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 [Formula omitted]. Measurements were carried out for unlike-sign and like-sign charge hadron pairs independently. The [Formula omitted] 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 [Formula omitted] 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.
Publisher
Springer
