Speaker
Peter Petreczky
(BNL)
Description
We calculate different types of Wilson loops of temporal size
t < 1/T at non-zero temperatures on the lattice using Highly Improved
Staggered Quark (HISQ) action and temporal extent Nt=8 and 12.
Unlike other static correlators which go around the periodic
boundary these Wilson loops are not related to the free energy
of static quark anti-quark pair. Therefore from the analysis of
the Wilson loop we extract the real part of the heavy quark
potential. We find that the extracted potential is systematically
larger than the singlet free energy calculated on the lattice.
At T>200MeV we supplement the calculated real part of the potential
with the imaginary part obtained in perturbation theory and evaluate
the quarkonium spectral functions. We find that all quarkonium
states except the Upsilon(1S) melt at temperatures T>300MeV.
Finally from the obtained spectral functions we calculate the
Euclidean correlation functions and compare them with available
lattice data.
Primary author
Peter Petreczky
(BNL)
Co-author
Dr
Alexei Bazavov
(BNL)
Peer reviewing
Paper
Paper files:
