Suppression of Υ (1S) at forward rapidity in Pb–Pb collisions at √sNN = 2.76 TeV

Abelev, B. and Antičić, Tome and Gotovac, Sven and Mudnić, Eugen and Planinić, Mirko and Poljak, Nikola and Simatović, Goran and Šuša, Tatjana and Vicković, Linda and Zyzak, M. (ALICE Collaboration) (2014) Suppression of Υ (1S) at forward rapidity in Pb–Pb collisions at √sNN = 2.76 TeV. Physics Letters B, 738. pp. 361-372. ISSN 0370-2693

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Abstract

We report on the measurement of the inclusive Υ (1S) production in Pb–Pb collisions at √sNN = 2.76 TeV carried out at forward rapidity (2.5 < y < 4) and down to zero transverse momentum using its μ+μ− decay channel with the ALICE detector at the Large Hadron Collider. A strong suppression of the inclusive Υ (1S) yield is observed with respect to pp collisions scaled by the number of independent nucleon– nucleon collisions. The nuclear modification factor, for events in the 0–90% centrality range, amounts to 0.30 ± 0.05(stat) ± 0.04(syst). The observed Υ (1S) suppression tends to increase with the centrality of the collision and seems more pronounced than in corresponding mid-rapidity measurements. Our results are compared with model calculations, which are found to underestimate the measured suppression and fail to reproduce its rapidity dependence.

Item Type: Article
Keywords: suppression, forward, ALICE
Date: 10 November 2014
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). Funded by SCOAP3. Received 3 July 2014. Received in revised form 18 September 2014. Accepted 1 October 2014. Available online 6 October 2014.
Divisions: Faculty of Science > Department of Physics
Project code: 119-0982887-1006, 098-0982887-2878
Publisher: Elsevier
Depositing User: Nikola Poljak
Date Deposited: 06 Feb 2015 19:23
Last Modified: 29 May 2016 20:32
URI: http://digre.pmf.unizg.hr/id/eprint/3652

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