Measurement of ϒ(1S + 2S + 3S) production in p + p and Au + Au collisions at √sNN = 200 GeV

Adare, A. and Makek, Mihael and Zolin, L. (PHENIX Collaboration) (2015) Measurement of ϒ(1S + 2S + 3S) production in p + p and Au + Au collisions at √sNN = 200 GeV. Physical Review C, 91. 024913. ISSN 0556-2813

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Measurements of bottomonium production in heavy-ion and p + p collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The inclusive yield of the three ϒ states, ϒ(1S + 2S + 3S), was measured in the PHENIX experiment via electron-positron decay pairs at midrapidity for Au + Au and p + p collisions at √sNN = 200 GeV. The ϒ(1S + 2S + 3S) → e+e− differential cross section at midrapidity was found to be Beedσ/dy = 108 ± 38 (stat) ± 15 (syst) ± 11 (luminosity) pb in p + p collisions. The nuclear modification factor in the 30% most central Au + Au collisions indicates a suppression of the total ϒ state yield relative to the extrapolation from p + p collision data. The suppression is consistent with measurements made by STAR at RHIC and at higher energies by the CMS experiment at the Large Hadron Collider.

Item Type: Article
Date: 24 February 2015
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2015) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Corporate Creators: PHENIX Collaboration
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 26 Feb 2015 12:35
Last Modified: 27 Feb 2016 07:23

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