Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2010-05-22
Physics
Nuclear Physics
Nuclear Experiment
4 pages, 6 figures, Lake Louise Winter Institute 2010, 15th-20th February 2010 Alberta, Canada
Scientific paper
The $\Upsilon(1S+2S+3S)\to e^{+}e^{-}$ cross section is measured at mid-rapidity ($y$) in $p+p$ collisions and in d$+Au$ collisions at center-of-mass energy $\sqrt{s}$ = 200 GeV with the STAR detector at RHIC. In $p+p$, the measured cross section is found to be consistent with the world data trend as a function of $\sqrt{s}$, in agreement with the Color Evaportaion Model (CEM), and underestimated by the Color Singlet Model (CSM) up to the Next-to-Leading-Order Quantum Chromodynamics (NLO QCD) calculations. In d+$Au$, the measured cross section is in agreement with the CEM prediction with anti-shadowing effects, and the nuclear modification factor indicates that $\Upsilon(1S+2S+3S)$ production follows binary scaling within the current uncertainties. These measurements provide a benchmark for the future measurements of $\Upsilon$ production in $Au+Au$ collisions.
No associations
LandOfFree
Upsilon Productions at STAR does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Upsilon Productions at STAR, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Upsilon Productions at STAR will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-412687