Speaker
Sandor Katz
(Eotvos University)
Description
We calculate the crossover line between the quark gluon plasma and the
hadron gas phases for small real chemical potentials using lattice
calculations. Since direct calculations at non-vanishing chemical
potentials are hindered by the sign problem we use imaginary chemical
potentials and perform analytic continuation to obtain the real $\mu$ phase
diagram. We use a 4stout staggered fermion action on lattices up to a
temporal extent of $N_t=16$ and perform a continuum extrapolation. In order to
describe the situation in heavy ion collisions the simulation parameters are
tuned such that strangeness neutrality is maintained. For the curvature of
the transition line we find that there is an approximate agreement between
values from three different observables: the chiral susceptibility, chiral
condensate and strange quark susceptibility.
Author
Sandor Katz
(Eotvos University)
Co-authors
Attila Pasztor
(Wuppertal University)
Claudia Ratti
(University of Houston)
Ms
Jana Günther
(University of Wuppertal)
Kalman Szabo
(Forschungszentrum Julich)
Rene Bellwied
(University of Houston (US))
Szabolcs Borsanyi
(University of Wuppertal)
Zoltan Fodor
(BUW)
