Rimoldi, Marco; Mullier, Geoffrey; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Meloni, Federico; Beck, Hans Peter; Ereditato, Antonio (2018). Prompt and non-prompt J/ψ and ψ (2S) suppression at high transverse momentum in 5.02 TeV Pb+Pb collisions with the ATLAS experiment. European physical journal. C - particles and fields, 78(9) EDP Sciences 10.1140/epjc/s10052-018-6219-9
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A measurement of J/ψ and ψ (2S) production is presented. It is based on a data sample from Pb+Pb collisions at √sNN = 5.02 TeV and pp collisions at √s = 5.02 TeV recorded by the ATLAS detector at the LHC in 2015, corresponding to an integrated luminosity of 0.42 nb⁻¹ and 25 pb⁻¹ in Pb+Pb and pp, respectively. The measurementsof per-event yields, nuclear modification factors, and non-prompt fractions are performed in the dimuon decay channel for 9 < pμμT < 40 GeV in dimuon transverse momentum, and −2 < yμμ < 2 in rapidity. Strong suppression is found in Pb+Pb collisions for both prompt and non-prompt J/ψ, increasing with event centrality. The suppression of prompt ψ (2S) is observed to be stronger than that of J/ψ, while the suppression of non-prompt ψ (2S) is equal to that of the non-prompt J/ψ within uncertainties, consistent with the expectation that both arise from b-quarks propagating through the medium. Despite prompt and non-prompt J/ψ arising from different mechanisms, the dependence of their nuclear modification factors on centrality is found to be quite similar.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Haug, Sigve, Weber, Michele, Beck, Hans Peter |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1434-6044 |
Publisher: |
EDP Sciences |
Language: |
English |
Submitter: |
BORIS Import LHEP |
Date Deposited: |
25 Jun 2019 10:21 |
Last Modified: |
05 Dec 2022 15:27 |
Publisher DOI: |
10.1140/epjc/s10052-018-6219-9 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt |
BORIS DOI: |
10.7892/boris.129050 |
URI: |
https://boris.unibe.ch/id/eprint/129050 |
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