Mass Shift and Width Broadening of J/psi in hot gluonic plasma from QCD Sum Rules

Details Mass Shift and Width Broadening of J/psi in hot gluonic plasma from QCD Sum Rules Mass Shift and Width Broadening of J/psi in hot gluonic plasma from QCD Sum Rules

2007-04-16

arxiv.org/abs/0704.2021v2

Phys.Rev.Lett.100:022301,2008

Physics

Nuclear Physics

Nuclear Theory

4 pages, 5 figures, version to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.100.022301

We investigate possible mass shift and width broadening of J/psi in hot gluonic matter using QCD sum rule. Input values of gluon condensates at finite temperature are extracted from lattice QCD data for the energy density and pressure. Although stability of the moment ratio is achieved only up to T/Tc ~ 1.05, the gluon condensates cause a decrease of the moment ratio, which results in change of spectral properties. Using the Breit-Wigner form for the phenomenological side, we find that mass shift of J/psi just above Tc can reach maximally 200 MeV and width can broaden to dozens of MeV.

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