Measurement of nuclear effects on ψ(2S) production in p-Pb collisions at √sNN = 8.16 TeV

S. Acharya , Daniel Dąbrowski , Kamil Deja , Łukasz Graczykowski , Monika Jakubowska , Małgorzata Janik , Adam Kisiel , Georgy Kornakov , Julian Myrcha , Łukasz Neumann , P. Nowakowski , Janusz Oleniacz , Przemysław Rokita , Krystian Rosłon , Tomasz Trzciński , Hanna Zbroszczyk


Inclusive ψ(2S) production is measured in p-Pb collisions at the centre-of-mass energy per nucleon-nucleon pair sNN = 8.16 TeV, using the ALICE detector at the CERN LHC. The production of ψ(2S) is studied at forward (2.03 < ycms< 3.53) and backward (−4.46 < ycms< −2.96) centre-of-mass rapidity and for transverse momentum pT< 12 GeV/c via the decay to muon pairs. In this paper, we report the integrated as well as the ycms- and pT-differential inclusive production cross sections. Nuclear effects on ψ(2S) production are studied via the determination of the nuclear modification factor that shows a strong suppression at both forward and backward centre-of-mass rapidities. Comparisons with corresponding results for inclusive J/ψ show a similar suppression for the two states at forward rapidity (p-going direction), but a stronger suppression for ψ(2S) at backward rapidity (Pb-going direction). As a function of pT, no clear dependence of the nuclear modification factor is found. The relative size of nuclear effects on ψ(2S) production compared to J/ψ is also studied via the double ratio of production cross sections [σψ(2S)J/ψ]pPb/[σψ(2S)J/ψ]pp between p-Pb and pp collisions. The results are compared with theoretical models that include various effects related to the initial and final state of the collision system and also with previous measurements at sNN = 5.02 TeV. [Figure not available: see fulltext.]
Collective authorThe ALICE collaboration
Author S. Acharya - [Variable Energy Cyclotron Centre India]
S. Acharya,,
, Daniel Dąbrowski (FP / NPD)
Daniel Dąbrowski,,
- Nuclear Physics Division
, Kamil Deja (FEIT / ICS)
Kamil Deja,,
- The Institute of Computer Science
, Łukasz Graczykowski (FP / NPD)
Łukasz Graczykowski,,
- Nuclear Physics Division
, Monika Jakubowska (FoEE / ICIE)
Monika Jakubowska,,
- The Institute of Control and Industrial Electronics
, Małgorzata Janik (FP / NPD)
Małgorzata Janik,,
- Nuclear Physics Division
, Adam Kisiel (FP / NPD)
Adam Kisiel,,
- Nuclear Physics Division
, Georgy Kornakov (FP / NPD)
Georgy Kornakov,,
- Nuclear Physics Division
, Julian Myrcha (FEIT / ICS)
Julian Myrcha,,
- The Institute of Computer Science
, Łukasz Neumann (FEIT / ICS)
Łukasz Neumann,,
- The Institute of Computer Science
et al.`
Total number of authors1004
Journal seriesJournal of High Energy Physics, ISSN 1029-8479, [1126-6708]
Issue year2020
Publication size in sheets1.3
Article number237
ASJC Classification3106 Nuclear and High Energy Physics
Languageen angielski
LicenseJournal (articles only); author's original; Uznanie Autorstwa (CC-BY); after publication
Measurement-of-nuclear-effects-on-2S-production-in-pPb-collisions-at-sNN--816-TeV2020Journal-of-High-Energy-PhysicsOpen-Access.pdf 993.33 KB
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 22-09-2020, ArticleFromJournal
Publication indicators Scopus Citations = 0; GS Citations = 2.0; WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.132; WoS Impact Factor: 2018 = 5.833 (2) - 2018=4.911 (5)
Citation count*2 (2020-08-19)
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