7 research outputs found
Spectral functions of charmonium with 2+1 flavours of dynamical quarks
Finite temperature charmonium spectral functions in the pseudoscalar(PS) and
vector(V) channels are studied in lattice QCD with 2+1 flavours of dynamical
Wilson quarks, on fine isotropic lattices (with a lattice spacing of 0.057fm),
with a non-physical pion mass of 545MeV. The highest temperature studied is
approximately 1.4Tc. Up to this temperature no significant variation of the
spectral function is seen in the PS channel. The V 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 omega > 0. These results are in accord with
previous calculations using the quenched approximation.Comment: Conference proceedings: The 32nd International Symposium on Lattice
Field Theory - Lattice 2014 June 23-28, 2014 Columbia University, New York,
New York This conference contribution draws heavily from the paper:
arXiv:1401.5940 [hep-lat
QCD thermodynamics with continuum extrapolated Wilson fermions II
We continue our investigation of 2+1 flavor QCD thermodynamics using dynamical Wilson fermions in the fixed scale approach. Two additional pion masses, approximately 440 MeV and 285 MeV, are added to our previous work at 545 MeV. The simulations were performed at 3 or 4 lattice spacings at each pion mass. The renormalized chiral condensate, strange quark number susceptibility and Polyakov loop is obtained as a function of the temperature and we observe a decrease in the light chiral pseudo-critical temperature as the pion mass is lowered while the pseudo-critical temperature associated with the strange quark number susceptibility or the Polyakov loop is only mildly sensitive to the pion mass. These findings are in agreement with previous continuum results obtained in the staggered formulation
Spectral functions of charmonium with 2+1 flavours of dynamical quarks
Finite temperature charmonium spectral functions in the
pseudoscalar(PS) and vector(V) channels are studied in lattice
QCD with 2+1 flavours of dynamical Wilson quarks, on fine
isotropic lattices (with a lattice spacing of 0.057fm), with a
non-physical pion mass of 545MeV. The highest temperature
studied is approximately 1.4Tc. Up to this temperature no
significant variation of the spectral function is seen in the PS
channel. The V 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 omega > 0. These results are in
accord with previous calculations using the quenched
approximation
More Results on Finite Temperature QCD with Wilson Fermions
We investigate 2 + 1 flavour QCD thermodynamics using dynamical Wilson fermions in thefixed scale approach. Our previous study at a pion mass of 545 MeV is extended with twoadditional pion masses, approximately 440 MeV and 280 MeV. We perform simulations using3 or 4 lattice spacings at each fixed pion mass and measure the renormalised chiral condensate,strange quark number susceptibility and Polyakov loop as a function of the temperature. Weobserve a decrease in the light chiral pseudo-critical temperature as the pion mass is loweredwhile the pseudo-critical temperature associated with the strange quark number susceptibilityor the Polyakov loop is only mildly sensitive to the pion mass. These findings are in agreementwith previous results obtained in the staggered formulation