ϒ production in p–Pb collisions at $\sqrt{s_{\mathrm{NN}} }= 8.16$ TeV

S. Acharya , D. Adamova , Daniel Dąbrowski , S. De , Kamil Deja , P. Ghosh , Łukasz Graczykowski , A. Gupta , A. Herghelegiu , C. Huang , Monika Jakubowska , Małgorzata Janik , Przemysław Karczmarczyk , A. M. Khan , S. Khan , S. A. Khan , D. Kim , D.J Kim , H. Kim , J. Kim , J. S. Kim , S. Kim , Adam Kisiel , M. Kowalski , J. Lee , S. Lee , X. Li , X. Li , S. Liu , Y. Ma , M.I. Martínez , H. Murakami , Julian Myrcha , Łukasz Neumann , Piotr Nowakowski , Janusz Oleniacz , J. Park , B. Paul , Jan Pluta , J. Rak , M. Richter , Przemysław Rokita , Krystian Rosłon , C. Schmidt , M.O. Schmidt , M Schmidt , Tomasz Trzciński , Barbara Trzeciak , Y. Wu , S. Yang , Ammar Zaman , Hanna Zbroszczyk , X. Zhang

Abstract

ϒ production in p–Pb interactions is studied at the centre-of-mass energy per nucleon–nucleon collision $\sqrt{s_{\mathrm{NN}} }= 8.16$ 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 < ycms < 3.53 and −4.46 < ycms < −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 $\sqrt{s_{\mathrm{NN}} }= 5.02$ TeV and with theoretical calculations.

Collective authorALICE Collaboration
Author S. Acharya
S. Acharya,,
-
, D. Adamova
D. Adamova,,
-
, Daniel Dąbrowski (FP / NPD)
Daniel Dąbrowski,,
- Nuclear Physics Division
, S. De - [Homi Bhabha National Institute, Mumbai]
S. De,,
-
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, Kamil Deja (FEIT / ICS)
Kamil Deja,,
- The Institute of Computer Science
, P. Ghosh
P. Ghosh,,
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, Łukasz Graczykowski (FP / NPD)
Łukasz Graczykowski,,
- Nuclear Physics Division
, A. Gupta
A. Gupta,,
-
, A. Herghelegiu - [Horia Hulubei National Institute of Physics and Nuclear Engineering]
A. Herghelegiu,,
-
-
, C. Huang
C. Huang,,
-
et al.`
Total number of authors1007
Journal seriesPhysics Letters B, [Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics], ISSN 0370-2693, e-ISSN 1873-2445
Issue year2020
Vol806
Pages1-25
Publication size in sheets1.2
Article number135486
Keywords in Englishrelativistic heavy ion physics ; quarkonium ; heavy quark production ; particle and resonance production ; experimental results
ASJC Classification3106 Nuclear and High Energy Physics
DOIDOI:10.1016/j.physletb.2020.135486
URL https://www.sciencedirect.com/science/article/pii/S0370269320302902?via%3Dihub#!
Languageen angielski
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 17-09-2020, ArticleFromJournal
Publication indicators Scopus Citations = 0; WoS Citations = 11; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.548; WoS Impact Factor: 2018 = 4.162 (2) - 2018=3.627 (5)
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