Morrin, R., O Cais, A., Oktay, M.B., Peardon, M., Skullerud, J.I. ‘Charmonium spectral functions in Nf=2 QCD’ in Proceedings of Science, LAT2005, 2005, pp176-1 – 176/6
Proceedings of Science LAT2005
We report on a study of charmonium at high temperature in 2-flavour QCD. This is the first such
study with dynamical fermions. Using an improved anisotropic lattice action, spectral functions
are extracted from correlators in the vector and pseudoscalar channels. No signs of mediuminduced
suppression of the ground states are seen for temperatures up to 1.5Tc, while at T ∼ 2Tc
there are clear signs of modifications. The current systematic and statistical uncertainties in our
data, in particular the relatively coarse lattice and small volume, do not allow us to draw a firm
conclusion at this stage.
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