A1 Journal article (refereed)
ϒ production in p–Pb collisions at √sNN = 8.16 TeV (2020)

ALICE Collaboration (2020). ϒ production in p–Pb collisions at √sNN = 8.16 TeV. Physics Letters B, 806, 135486. DOI: 10.1016/j.physletb.2020.135486

JYU authors or editors

Publication details

All authors or editors: ALICE Collaboration

Journal or series: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Publication year: 2020

Volume: 806

Article number: 135486

Publisher: Elsevier

Publication country: Netherlands

Publication language: English

DOI: http://doi.org/10.1016/j.physletb.2020.135486

Open Access: Publication published in an open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/71027

Publication is parallel published: https://arxiv.org/abs/1910.14405


ϒ production in p–Pb interactions is studied at the centre-of-mass energy per nucleon–nucleon collision √sNN=8.16 TeV with the ALICE detector at the CERN LHC. The measurement is performed reconstructing bottomonium resonances via their dimuon decay channel, in the centre-of-mass rapidity intervals 2.03<3.53 and −4.46<−2.96, down to zero transverse momentum. In this work, results on the ϒ(1S) production cross section as a function of rapidity and transverse momentum are presented. The corresponding nuclear modification factor shows a suppression of the ϒ(1S) yields with respect to pp collisions, both at forward and backward rapidity. This suppression is stronger in the low transverse momentum region and shows no significant dependence on the centrality of the interactions. Furthermore, the ϒ(2S) nuclear modification factor is evaluated, suggesting a suppression similar to that of the ϒ(1S). A first measurement of the ϒ(3S) has also been performed. Finally, results are compared with previous ALICE measurements in p–Pb collisions at √sNN=5.02 TeV and with theoretical calculations.

Keywords: particle physics

Contributing organizations

Ministry reporting: Yes

Last updated on 2020-02-07 at 11:29