Charmonium correlators and spectral functions at finite temperature

F. Karsch; H. Satz; H.-T. Ding; O. Kaczmarek; W. Soeldner

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Charmonium correlators and spectral functions at finite temperature

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arxiv 0910.3098 v1 pith:FICFD3X5 submitted 2009-10-16 hep-lat hep-ph

Charmonium correlators and spectral functions at finite temperature

H.-T. Ding , O. Kaczmarek , F. Karsch , H. Satz , W. Soeldner This is my paper

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keywords correlatorscharmoniumfunctionsspectralreliableaccuracyallowalmost

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We study charmonium correlators and spectral functions in quenched QCD, using Clover improved Wilson fermions on very fine (0.015 fm) isotropic lattices at 0.75 Tc and 1.5 Tc. We use a new approach to distinguish the zero mode contribution from the other contributions. Once this is removed, we find that the ratios of correlators to reconstructed correlators remain almost unity at all distances. The ground state peaks of spectral functions obtained at 0.75 Tc are reliable and robust. The present accuracy and limited number of points in the temporal direction at 1.5 Tc do not allow for a reliable conclusion about a possible melting of charmonium states in the QGP.

Charmonium correlators and spectral functions at finite temperature

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