Two-particle Bose-Einstein correlations in pp collisions at root s=0.9 and 7 TeV measured with the ATLAS detector

A. Do Valle Wemans, ATLAS Collaboration

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The paper presents studies of Bose-EinsteinCorrelations (BEC) for pairs of like-sign charged particles measured in the kinematic range p(T) > 100 MeV and |eta| <2.5 in proton-proton collisions at centre-of-mass energies of 0.9 and 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. The integrated luminosities are approximately 7 mu b(-1), 190 mu b(-1) and 12.4 nb(-1) for 0.9 TeV, 7 TeV minimum-bias and 7 TeV high-multiplicity data samples, respectively. The multiplicity dependence of the BEC parameters characterizing the correlation strength and the correlation source size are investigated for charged-particle multiplicities of up to 240. A saturation effect in the multiplicity dependence of the correlation source size parameter is observed using the high-multiplicity 7 TeV data sample. The dependence of the BEC parameters on the average transverse momentum of the particle pair is also investigated.
Original languageEnglish
Article number466
JournalEuropean Physical Journal C: Particles and Fields
Volume75
Issue number10
DOIs
Publication statusPublished - 1 Oct 2015

Keywords

  • DUAL PARTON MODEL
  • PION INTERFEROMETRY
  • MULTIPLICITY DEPENDENCE
  • (P)OVER-BARP REACTIONS
  • IDENTICAL PIONS
  • INTERFERENCE
  • ANNIHILATION
  • RESONANCES
  • POMERON
  • PHYSICS

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