υproduction in p+p, d+Au, Au+Au collisions at √SNN =200 GeV in STAR
Abstract
The properties of the dense matter produced in heavy-ion collisions can be investigated by studying its effect on quarkonia production. In particular, the υstates are of interest because both the effect due to co-movers and feed down is smaller than for J/ψ. Suppression of quarkonia is theorized to be a QGP signature due to the Debye color screening of the potential between the heavy quarks. Lattice studies show that a sequential suppression of quarkonia states in heavy ion collisions when compared to production in p+p collisions can provide us with a thermometer for the matter produced in relativistic heavy-ion collisions. This requires a detailed understanding of υproduction in p+p collisions, as well as d+Au calculations so that RAA can determined. We will present our preliminary results for mid-rapidty υproduction in p+p, d+Au, and Au+Au at √SNN =200 GeV in the STAR experiment. We will compare these results with theoretical QCD calculations.
- Publication:
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APS Meeting Abstracts
- Pub Date:
- October 2009
- Bibcode:
- 2009APS..HAW.CB010R