Two-particle Bose–Einstein correlations in pp collisions at root s = 0.9 and 7 TeV measured with the ATLAS detector
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KünyeAad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R. ... ATLAS Collaboration. (2015). Two-particle Bose–Einstein correlations in pp collisions at root s = 0.9 and 7 TeV measured with the ATLAS detector. European Physical Journal C, 75(10), 1-25. http://dx.doi.org/10.1140/epjc/s10052-015-3644-x
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.