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 medium-induced suppression of the ground states are seen for temperatures up to 1.5T_c, while at T~2T_c 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.
@article{arxiv.hep-lat/0509115,
title = {Charmonium spectral functions in Nf=2 QCD},
author = {R. Morrin and A. P. O Cais and M. B. Oktay and M. J. Peardon and J. I. Skullerud and G. Aarts and C. R. Allton},
journal= {arXiv preprint arXiv:hep-lat/0509115},
year = {2011}
}
Comments
6 pages, talk by JIS at Lattice 2005 (Non-zero temperature and density)