Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-10-31
Phys.Rev.D75:034505,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, 4 figures, to be published in Physcial Review D
Scientific paper
10.1103/PhysRevD.75.034505
We compare current-current correlators in lattice gauge calculations with correlators in different potential models, for a pseudoscalar charmonium in the quark-gluon plasma. An important ingredient in the evaluation of the current-current correlator in the potential model is the basic principle that out of the set of continuum states, only resonance states and Gamow states with lifetimes of sufficient magnitudes can propagate as composite objects and can contribute to the current-current correlator. When the contributions from the bound states and continuum states are properly treated, the potential model current-current correlators obtained with the potential proposed in Ref. [11] are consistent with the lattice gauge correlators. The proposed potential model thus gains support to be a useful tool to complement lattice gauge calculations for the study of $Q\bar Q$ states at high temperatures.
Crater Horace W.
Wong Cheuk-Yin
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