J/Ψ Transport in QGP & Pt Distribution at RHIC

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Presentation transcript:

J/Ψ Transport in QGP & Pt Distribution at RHIC X. Zhu, P. Zhuang & N. Xu Motivation J/Ψ transport equation Gluonic dissociation process in QGP Medium evolution Pt distribution Elliptic flow Conclusions 2004-8-7 Weihai Workshop

Motivation J/Ψ suppression: an important signature of QGP Normal suppression: nuclear absorption Anomalous suppression: due to QGP or comovers Possible new mechanism at RHIC: coalescence V2 of J/Ψ: sensitive to initial stage Data of J/Ψsuppression: in the near future Almost all models can describe the suppression! Can Pt distribution help us to understand the production mechanism ? 2004-8-7 Weihai Workshop

●J/Ψ is produced through initial NN collisions, no recombination Idea of this work ●J/Ψ is produced through initial NN collisions, no recombination ● J/Ψ transport in QGP and is anomalously suppressed by QGP ● QGP evolution is controlled by ideal hydrodynamics ● focus on Pt distribution 2004-8-7 Weihai Workshop

J/Ψ transport equation loss term: anomalous suppression gluon distribution flux factor gluonic dissociation process Initial condition: normal suppression Normal Pt broadening due to Cronin effect 2004-8-7 Weihai Workshop

Gluonic dissociation process in QGP : gluon energy : binding energy of J/Ψ 2004-8-7 Weihai Workshop

Medium evolution Hydrodynamics: EoS: Lattice result Initial condition: determined by Freeze-out: 2004-8-7 Weihai Workshop

Bjorken space-time evolution for medium hydrodynamics and J/Ψ transport analytic solution 2004-8-7 Weihai Workshop

Suppression and Pt distribution at SPS 2004-8-7 Weihai Workshop

Suppression and Pt distribution at RHIC without considering normal suppression 2004-8-7 Weihai Workshop

Elliptic flow at SPS 2004-8-7 Weihai Workshop

Elliptic flow at RHIC 2004-8-7 Weihai Workshop

● V2 can differentiate initial production from coalescence Conclusions ● J/Ψ transport + medium hydrodynamics can explain both the suppression and Pt distribution ● V2 can differentiate initial production from coalescence 2004-8-7 Weihai Workshop