Prompt and non-prompt J/psi and psi(2S) suppression at high transverse momentum in 5.02 TeV Pb+Pb collisions with the ATLAS experimentShow others and affiliations
Number of Authors: 29052018 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 78, no 9, article id 762Article in journal (Refereed) Published
Abstract [en]
A measurement of J/psi and psi(2S) production is presented. It is based on a data sample from Pb+Pb collisions at root s(NN) = 5.02 TeV and pp collisions at root 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 measurements of per-event yields, nuclear modification factors, and non-prompt fractions are performed in the dimuon decay channel for 9 < p(T)(mu mu) < 40 GeV in dimuon transverse momentum, and -2 < y(mu mu) < 2 in rapidity. Strong suppression is found in Pb+Pb collisions for both prompt and non-prompt J/psi, increasing with event centrality. The suppression of prompt psi(2S) is observed to be stronger than that of J/psi, while the suppression of non-prompt psi(2S) is equal to that of the non-prompt J/psi within uncertainties, consistent with the expectation that both arise from b-quarks propagating through the medium. Despite prompt and non-prompt J/psi arising from different mechanisms, the dependence of their nuclear modification factors on centrality is found to be quite similar.
Place, publisher, year, edition, pages
SPRINGER , 2018. Vol. 78, no 9, article id 762
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-366729DOI: 10.1140/epjc/s10052-018-6219-9ISI: 000445396900004OAI: oai:DiVA.org:uu-366729DiVA, id: diva2:1270196
Funder
Swedish Research CouncilEU, European Research CouncilEU, FP7, Seventh Framework ProgrammeEU, Horizon 2020
Note
For complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-018-6219-9
2018-12-122018-12-122018-12-12Bibliographically approved