Quarkonia measurement in p+p and d+Au collisions at -~Is=200 GeV by PHENIX Detector.

摘要

We report new quarkonia measurements necessary to understand production mechanisms and cold nuclear matter effects in the yields observed at RHIC energy. Results obtained in p+p collisions collected during the 2006 RHIC Run include J/ψ , ψ/ and Υ differential cross sections as well as J/ψ polarization. Revisited interpretations of the published J/ψ nuclear modification factors and statistically improved observations in d+Au collisions taken in the 2008 Run are also discussed in the view of the recent understanding of the initial state effects and breakup cross section.