Summary: CHARMONIUM FROM ANISOTROPIC LATTICES IN Nf=2 QCD
G. Aarts 1 , C.R Allton 1 , R. Morrin 2 , A.P. ’
O Cais 2 , M.B. Oktay 2 , M.J. Peardon 2 , J.I. Skullerud 2
1 Department of Physics, University of Wales Swansea, Singleton Park,
Swansea SA2 8PP, UK
2 The Trinlat Collaboration, School of Mathematics, Trinity College,
Dublin 2, Ireland
Abstract
We report on a study of charmonium at high temperature in 2­flavour QCD
using improved anisotropic lattices. This is the first such study with dynam­
ical fermions. Spectral functions are extracted from correlators in the vector
and pseudoscalar channels using the maximum entropy method. No signs of
medium­induced 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.
1 Introduction
The fate of charmonium states in the deconfined phase of QCD has long been a subject of interest,
following the suggestion [1] that J= suppression may be a signature of deconfinement in heavy­ion

Source: Aarts, Gert - Department of Physics, University of Wales Swansea

Collections: Physics