2014/01/31 by Szabolcs Borsanyi, Stephan Durr, Zoltan Fodor +10 · 1 citation
Physics and Astronomy · #hep-lat
paper · pdf · doi:10.1007/jhep04(2014)132
published as JHEP 1404 (2014) 132 · 17 pages, 9 figures, 2 tables
arxiv created 2014/07/02 · arxiv updated 2014/07/03
Finite temperature charmonium spectral functions in the pseudoscalar and vector channels are studied in lattice QCD with 2+1 flavours of dynamical Wilson quarks, on fine isotropic lattices (with a lattice spacing of 0.057 fm), with a non-physical pion mass of mπ ≈ 545 MeV. The highest temperature studied is approximately 1.4 Tc. Up to this temperature no significant variation of the spectral function is seen in the pseudoscalar channel. The vector channel shows some temperature dependence, which seems to be consistent with a temperature dependent low frequency peak related to heavy quark transport, plus a temperature independent term at ω>0. These results are in accord with previous calculations using the quenched approximation.