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

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

[img]
Preview
Text
Aaboud2018_Article_PromptAndNon-promptJPsiJΨAndPs.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (1MB) | Preview

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, Michael and 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:

14 Sep 2020 17:13

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

Actions (login required)

Edit item Edit item
Provide Feedback