Two-particle Bose–Einstein correlations in pp collisions at (Formula presented.) 0.9 and 7 TeV measured with the ATLAS detector

The ATLAS Collaboration

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The paper presents studies of Bose– Einstein Correlations (BEC) for pairs of like-sign charged particles measured in the kinematic range (Formula presented.) in 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 (Formula presented.) 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 (US)
Article number466
Pages (from-to)1-25
Number of pages25
JournalEuropean Physical Journal C
Issue number10
StatePublished - Oct 1 2015


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Engineering (miscellaneous)

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