Hadroproduction of Charmonium Excited States and Bottomonium at $\sqrt{s_{NN}}=200 GeV$ Measured by PHENIX Detector

ORAL

Abstract

During the last few years RHIC has demonstrated sizable medium effects on the inclusive $J/\psi$ yields in heavy ion collisions. Feed-down contributions, mainly from excited charmonium states $\chi_C$ and $\psi^{\prime}$, should be considered when comparing the measured production and medium modification factors with theoretical models. Relative production between different charmonium states can also provide insights about the production mechanisms, different hadronic absorption or breakup cross sections and sequential charmonium dissociation in sQGP. Bottomonium measurements can probe the same physics involved in charmonium, but with more reliable theoretical production calculations, no important coalescence at RHIC energies and a presumed higher dissociation temperature. In this presentation we will show recent measurements of $\chi_c$, $\psi^{\prime}$ in $p$+$p$ collisions, $\Upsilon$(1S,2S,3S) in $p$+$p$ and Au+Au collisions, the progress towards these similar measurements in $d$+Au collisions as well as expected advances using upcoming detector upgrades in PHENIX.

Authors

  • Cesar L. Silva

    Iowa State University