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Quarkonium Production at STAR

Name: Quarkonium Production at STAR
Creator: Christopher Beresford Powell
Keywords: High Energy Physics - Experiment (hep-ex), 0103 physical sciences, FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 31 May 2012Embargo end date: 01 Jan 2011Publisher:Sissa MedialabJournal:Proceedings of XXIst International Europhysics Conference on High Energy Physics — PoS(EPS-HEP2011)

Authors: Christopher Beresford Powell;

doi: 10.22323/1.134.0485 , 10.48550/arxiv.1111.6944

arXiv: http://arxiv.org/abs/1111.6944

Quarkonium Production at STAR

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Abstract

We report the results on heavy quarkonium production in p+p and Au+Au collisions at midrapidity via the dielectron decay channel at sqrt(s_NN) = 200 GeV from the STAR experiment at RHIC. Results on the J/psi p_T spectra in p+p collisions are presented for 2 < p_T < 10 GeV/c. The B-meson feed-down contribution to the inclusive J/psi yield has been obtained using the J/psi-hadron azimuthal angular correlation in p+p collisions, and is found to be 10-25% in the range 4 < p_T < 12 GeV/c. The p_T spectrum and nuclear modification factor for J/psi with p_T < 10 GeV/c is reported, along with results from Upsilon(1S+2S+3S) production in Au+Au collisions. The nuclear modification factor for high-p_T J/psi (p_T > 5 GeV/c) is found to be consistent with unity in peripheral collisions, while a significant suppression of low-p_T J/psi and Upsilon is observed in central collisions. The elliptic flow of J/psi is reported for 20-60% central Au+Au collisions, and is found to be consistent with zero.

5 pages, 3 figures, proceedings for EPS-HEP 2011

Related Organizations

Lawrence Berkeley National Laboratory
United States

Keywords

High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment, High Energy Physics - Experiment

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