J/ψ production at high transverse momenta in p+p and Cu+Cu collisions at √sNN=200 GeV

Abelev, B. I. and Planinić, Mirko and Poljak, Nikola and Zuo, J. X. (STAR Collaboration) (2009) J/ψ production at high transverse momenta in p+p and Cu+Cu collisions at √sNN=200 GeV. Physical Review C, 80 (4). 41902(R)-6. ISSN 0556-2813

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The STAR Collaboration at the Relativistic Heavy Ion Collider presents measurements of J/ψ→e+e− at midrapidity and high transverse momentum (pT>5 GeV/c) in p+p and central Cu+Cu collisions at √sNN=200 GeV. The inclusive J/ψ production cross section for Cu+Cu collisions is found to be consistent at high pT with the binary collision-scaled cross section for p+p collisions. At a confidence level of 97%, this is in contrast to a suppression of J/ψ production observed at lower pT. Azimuthal correlations of J/ψ with charged hadrons in p+p collisions provide an estimate of the contribution of B-hadron decays to J/ψ production of 13%±5%.

Item Type: Article
Keywords: J/psi, STAR, heavy ion, scattering
Date: October 2009
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2009) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-0982887-1006
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 10 Jun 2014 10:22
Last Modified: 30 May 2016 12:26
URI: http://digre.pmf.unizg.hr/id/eprint/2325

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