Measurement of ϒ(1S) elliptic flow at forward rapidity in Pb-Pb collisions at √sNN = 5.02 TeV

The first measurement of the ϒ(1S) elliptic flow coefficient (v2) is performed at forward rapidity (2.5 < y < 4) in Pb–Pb collisions at √sNN = 5.02 TeV with the ALICE detector at the LHC. The results are obtained with th
The first measurement of the ϒ(1S) elliptic flow coefficient (v2) is performed at forward rapidity (2.5 < y < 4) in Pb–Pb collisions at √sNN = 5.02 TeV with the ALICE detector at the LHC. The results are obtained with the scalar product method and are reported as a function of transverse momentum (pT) up to 15 GeV/c in the 5%–60% centrality interval. The measured Υ(1S)v2 is consistent with 0 and with the small positive values predicted by transport models within uncertainties. The v2 coefficient in 2 < pT < 15 GeV/c is lower than that of inclusive J/ψ mesons in the same pT interval by 2.6 standard deviations. These results, combined with earlier suppression measurements, are in agreement with a scenario in which the Υ(1S) production in Pb–Pb collisions at LHC energies is dominated by dissociation limited to the early stage of the collision, whereas in the J/ψ case there is substantial experimental evidence of an additional regeneration component.
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Author:Shreyasi Acharya, Alexander Adler, Torsten Alt, Harald Appelshäuser, Jan de Cuveland, Raphae͏̈lle Bailhache, Esther Bartsch, Lars Karlot Stubberud Bratrud, Theo Alexander Broker, Henner Büsching, Benjamin Dönigus, Pascal Dillenseger, Heiko Engel, Andrés Gómez Ramírez, Sergey Gorbunov, Stefan Thomas Heckel, Ernst Hellbär, Patrick Huhn, Dirk Hutter, Udo Kebschull, Stefan Kirsch, Ivan Kisel, Carsten Klein, Mario Krüger, Mikolaj Krzewicki, Sarah LaPointe, Johannes Lehrbach, Volker Lindenstruth, Matteo Lupi, Philipp Lüttig, Marco Marquard, Adrian Mechler, Robert Münzer, Renato Aparecido Negrao de Oliveira, Gvozden Neskovic, Edgar Pérez Lezama, Vladimir Peskov, Fabian Pliquett, Theodor B. Rascanu, Patrick Reichelt, Rainer Ernst Arno Renfordt, Sebastian Scheid, Nicolas Schmidt, Alberica Toia, Jens Wiechula
URN:urn:nbn:de:hebis:30:3-535612
DOI:http://dx.doi.org/10.1103/PhysRevLett.123.192301
ISSN:1079-7114
ISSN:0031-9007
ISSN:1092-0145
Pubmed Id:http://www.ncbi.nlm.nih.gov/pubmed?term=31765217
Parent Title (English):Physical review letters
Publisher:APS
Place of publication:College Park, Md.
Document Type:Article
Language:English
Year of Completion:2019
Date of first Publication:2019/11/06
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Contributing Corporation:A Large Ion Collider Experiment Collaboration
Release Date:2020/05/18
Tag:Nuclear Physics
Volume:123
Issue:19
Pagenumber:13
First Page:192301-1
Last Page:192301-13
Note:
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
HeBIS PPN:46602133X
Institutes:Physik
Informatik
Hochschulrechenzentrum
Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 4.0

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