J/psi production at high transverse momenta in p plus p and Cu plus Cu collisions at [sqrt] s(NN)=200 GeV
Author(s)Walker, Matthew H.; Sakuma, Tai; Redwine, Robert P.; Milner, Richard G.; Leight, William Axel; Kocoloski, Adam Philip; Jones, Christopher LaDon; Hoffman, A. M.; Corliss, Ross Cameron; Betancourt, Michael Joseph; Surrow, Bernd; Balewski, Jan T.; ... Show more Show less
J/ψ production at high transverse momenta in p + p and Cu + Cu collisions at √sNN=200 GeV
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The STAR Collaboration at the Relativistic Heavy Ion Collider presents measurements of J/psi-->e+e- at midrapidity and high transverse momentum (pT>5 GeV/c) in p+p and central Cu+Cu collisions at [sqrt]sNN=200 GeV. The inclusive J/psi 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/psi production observed at lower pT. Azimuthal correlations of J/psi with charged hadrons in p+p collisions provide an estimate of the contribution of B-hadron decays to J/psi production of 13%±5%.
DepartmentMassachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Physical Review C
American Physical Society
STAR Collaboration et al. “J/ psi production at high transverse momenta in p+p and Cu+Cu collisions at [sqrt]sNN=200 GeV.” Physical Review C 80.4 (2009): 041902. © 2009 American Physical Society.
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