https://doi.org/10.1140/epjc/s10052-009-1018-y
Regular Article - Experimental Physics
Quarkonia measurements with STAR
Physics Department, Brookhaven National Laboratory, Upton, NY, 11973, USA
* e-mail: thomas.ullrich@bnl.gov
Received:
12
September
2008
Revised:
4
March
2009
Published online:
27
March
2009
We report results on quarkonium production from the STAR experiment at the Relativistic Heavy-Ion Collider (RHIC). J/ψ spectra in p+p and Cu+Cu collisions at
GeV with transverse momenta in the range of 0.5–14 GeV/c and 5–8 GeV/c, respectively, are presented. We find that for p
T
>5 GeV/c yields in p+p collisions are consistent with those in minimum-bias Cu+Cu collisions scaled with the respective number of binary nucleon-nucleon collisions. In this range the nuclear modification factor, R
AA
, is measured to be 0.9±0.2 (stat). For the first time at RHIC, high-p
T
J/ψ-hadron correlations were studied in p+p collisions. Implications from our measurements on J/ψ production mechanisms, constraints on open bottom yields, and J/ψ dissociation mechanisms at high-p
T
are discussed. In addition, we give a brief status of measurements of ϒ production in p+p and Au+Au collisions and present projections of future quarkonia measurements based on an upgrades to the STAR detector and increased luminosity achieved through stochastic cooling of RHIC.
PACS: 25.75.Cj – / 25.75.Nq – / 12.38.Mh – / 14.40.Gx –
© Springer-Verlag , 2009