Speaker
Gabor Almasi
(GSI)
Description
Considering effective models constructed to be in the same universality class as QCD,
we discuss the role of critical fluctuations in the vicinity of the chiral transition.
In recent lattice calculations [Ejiri et al., Phys. Rev. D 80 (2009) 094505 ] QCD with physical quark
masses is found to be in the scaling regime of the O(4) universality class.
We examine the O(4) scaling in the context of effective
models at small net baryon density and discuss differences and similarities
with lattice QCD results and their consequences.
Moreover, we explore the critical fluctuations near the chiral critical
endpoint (CEP), which belongs to the Z(2) universality class, in a chiral effective model
and discuss possible signals of the CEP, recently explored in nuclear
collision experiments [Adamczyk et al., Phys. Rev. Lett. 113 (2014) 092301]. Particular attention is attributed to the dependence of
such signals on the location of the phase boundary and the CEP relative to the
hypothetical freeze out conditions in nuclear collisions.
Authors
Bengt Friman
(GSI)
Gabor Almasi
(GSI)
Krzysztof Redlich
(University of Wroclaw)
Tarnowski Wojciech
(Jagiellonian University)
