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Two-particle Bose–Einstein correlations in pp collisions at √s=13 TeV measured with the ATLAS detector at the LHC
Journal article   Open access   Peer reviewed

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

G Aad, B Abbott, D. C. Abbott, A. Abed Abud, K. Abeling and ATLAS Collaboration
The European physical journal. C, Particles and fields, Vol.82(7), 608
07/11/2022
DOI: 10.1140/epjc/s10052-022-10472-0
url
https://doi.org/10.1140/epjc/s10052-022-10472-0View
Published (Version of record) Open Access

Abstract

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 μ b - 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 p T > 100 MeV and the second with particle p T > 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 previous observation at lower energy. This saturation occurs independent of the transverse momentum of the pair.

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