DOI

  • NA61/SHINE Collaboration
  • A. Aduszkiewicz
  • E. V. Andronov
  • T. Antićić
  • V. Babkin
  • M. Baszczyk
  • S. Bhosale
  • A. Blondel
  • M. Bogomilov
  • A. Brandin
  • A. Bravar
  • W. Bryliński
  • J. Brzychczyk
  • M. Buryakov
  • O. Busygina
  • A. Bzdak
  • H. Cherif
  • M. Ćirković
  • M. Csanad
  • J. Cybowska
  • T. Czopowicz
  • A. Damyanova
  • N. Davis
  • M. Deliyergiyev
  • M. Deveaux
  • A. Dmitriev
  • W. Dominik
  • P. Dorosz
  • J. Dumarchez
  • R. Engel
  • G. A. Feofilov
  • L. Fields
  • Z. Fodor
  • A. Garibov
  • M. Gaździcki
  • O. Golosov
  • V. Golovatyuk
  • M. Golubeva
  • K. Grebieszkow
  • F. Guber
  • A. Haesler
  • S. N. Igolkin
  • S. Ilieva
  • A. Ivashkin
  • V. N. Kovalenko
  • T. V. Lazareva
  • A. O. Merzlaya
  • D. S. Prokhorova
  • A. Yu. Seryakov
  • D. Uzhva
  • F. F. Valiev
  • V. V. Vechernin

A measurement of charged hadron pair correlations in two-dimensional Δ ηΔ ϕ 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 Ge/c. Measurements were carried out for unlike-sign and like-sign charge hadron pairs independently. The C(Δ η, Δ ϕ) 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 (Δ η, Δ ϕ) = (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.

Язык оригиналаанглийский
Номер статьи1151
ЖурналEuropean Physical Journal C
Том80
Номер выпуска12
DOI
СостояниеОпубликовано - дек 2020

    Предметные области Scopus

  • Технология (разное)
  • Физика и астрономия (разное)

ID: 72020744