Owe Philipsen
(University of Frankfurt)
15/06/2010, 14:30
Nonzero temperature and density
We present unambiguous evidence from lattice simulations of QCD with three degenerate
quark species for two tricritical points in the $(T,m)$ phase diagramat fixed imaginary $\mu/T=i\pi/3$
mod $2\pi/3$,
one in the light and one in the heavy mass regime. They represent the boundaries of the chiral and deconfinement critical lines continued to imaginary chemical potential, respectively.
It...
Bertram Klein
(Physik Department, Technische Universität München)
15/06/2010, 14:50
Nonzero temperature and density
The curvature which characterizes the QCD phase transition at finite temperature and small values of the chemical potential is accessible to lattice simulations. The results for this quantity which have been obtained by several different lattice simulation methods differ due to different numbers of flavors, different pion masses and different sizes of the simulations volumes. In order to...
Leonardo Cosmai
(INFN Bari)
15/06/2010, 15:10
Nonzero temperature and density
We determine the pseudo-critical couplings at imaginary chemical potentials by high-statistics Monte Carlo simulations of QCD with four degenerate quarks at non-zero temperature and baryon density by the method of analytic continuationan.
We reveal deviations from the simple quadratic dependence on the chemical potential visible in earlier works on the same subject.
Finally, we discuss the...
Hideaki Iida
(Hashimoto Mathematical Physics Laboratory, Nishina Center, RIKEN, Japan)
15/06/2010, 15:30
Nonzero temperature and density
Spatial meson correlators at finite temperature are studied on lattice QCD.
Two-flavor gauge configurations of 16^3*4 lattice with the RG improved
gluon action and the clover-improved Wilson quark action,
generated by WHOT-QCD collaboration, are employed [1].
The simulations are performed along the lines of constant physics,
on which the mass ratio of pseudo-scalar meson to vector...
Joyce Myers
(Swansea University)
15/06/2010, 15:50
Nonzero temperature and density
We consider the phase diagram of QCD formulated in small spatial volumes. The benefit of the small spatial volume is that it allows for a perturbative calculation of the phase diagram which is valid for all temperatures and densities. The action of QCD is complex when the quarks are coupled to a non-zero chemical potential. This results in the sign problem which prevents lattice simulations...
