Two-particle Bose–Einstein correlations in pp collisions at√s = 13 TeV measured with the ATLAS detector at the LHC

ATLAS Publications, M. Faucci Giannelli, Ahmed Hasib, M.P. Heath, X. Hoad, S. Palazzo, Andreas Søgaard, A. Strubig, E.P. Takeva, A.J. Taylor, A. Washbrook

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

This paper presents studies of Bose–Einstein correlations (BEC) in proton–proton collisions at a centre-of-mass energy of 13 TeV, using data from the ATLAS detector at the CERN Large Hadron Collider. Data were collected in a special low-luminosity configuration with a minimum-bias trigger and a high-multiplicity track trigger, accumulating integrated luminosities of 151 μb−1 and 8.4 nb−1 ,
respectively. The BEC are measured for pairs of like-sign charged particles, each with |η| < 2.5, for two kinematic ranges: the first with particle pT > 100 MeV and the second with particle pT > 500 MeV. The BEC parameters, characterizing the source radius and particle correlation strength, are investigated as functions of charged-particle multiplicity (up to 300) and average transverse momentum of the pair (up to 1.5 GeV). The double-differential dependence on charged-particle multiplicity and average transverse momentum of the pair is also studied. The BEC radius is found to be independent of the charged-particle multiplicity for high charged-particle multiplicity (above 100), confirming a pre-
vious observation at lower energy. This saturation occurs independent of the transverse momentum of the pair.
Original languageEnglish
Article number608
Pages (from-to)1-38
Number of pages38
JournalThe European Physical Journal C
Volume82
Issue number7
DOIs
Publication statusPublished - 11 Jul 2022

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