Abraham, N L, Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Jones, S D, Lerner, G, Miano, F, Salvatore, F, Santoyo Castillo, I, Shaw, K, Stevenson, T J, Suruliz, K, Sutton, M R, Tresoldi, F, Trovato, F, Vivarelli, I, Winkels, E, Winston, O J, The ATLAS Collaboration, and others, (2018) Prompt and non-prompt J/ψ elliptic flow in Pb+Pb collisions at √sNN =5.02 TeV with the ATLAS detector. European Physical Journal C : Particles and Fields, 78 (784). pp. 1-23. ISSN 1434-6044
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Abstract
The elliptic flow of prompt and non-prompt J/ψ was measured in the dimuon decay channel in Pb+Pb collisions at √sNN = 5.02 TeV with an integrated luminosity of 0.42 nb −1 with the ATLAS detector at the LHC. The prompt and non-prompt signals are separated using a two-dimensional simultaneous fit of the invariant mass and pseudo-proper decay time of the dimuon system from the J/ψ decay. The measurement is performed in the kinematic range of dimuon transverse momentum and rapidity 9<p T <30 GeV,|y|<2 , and 0-60% collision centrality. The elliptic flow coefficient,v2, is evaluated relative to the event plane and the results are presented as a function of transverse momentum, rapidity and centrality. It is found that prompt and non-prompt J/ψ mesons have non-zero elliptic flow. Prompt J/ψ v 2 decreases as a function of p T , while non-prompt J/ψ it is, with limited statistical significance, consistent with a flat behaviour over the studied kinematic region. There is no observed dependence on rapidity or centrality.
Item Type: | Article |
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Schools and Departments: | School of Mathematical and Physical Sciences > Physics and Astronomy |
Research Centres and Groups: | Experimental Particle Physics Research Group |
Subjects: | Q Science > QC Physics |
Depositing User: | Alice Jackson |
Date Deposited: | 12 Nov 2018 11:51 |
Last Modified: | 12 Nov 2018 15:01 |
URI: | http://srodev.sussex.ac.uk/id/eprint/80133 |
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