TITLE:
Arguing on Entropic and Enthalpic First-Order Phase Transitions in Strongly Interacting Matter
AUTHORS:
F. Wunderlich, R. Yaresko, B. Kämpfer
KEYWORDS:
Entropic and Enthalpic Phase Transitions, Chiral Phase Transition, Isentropes, Quark-Meson Model, Linear Sigma Model with Linearized Fluctuations
JOURNAL NAME:
Journal of Modern Physics,
Vol.7 No.8,
April
29,
2016
ABSTRACT: The pattern of isentropes in the vicinity of a first-order phase
transition is proposed as a key for a sub-classification. While the confinement-deconfinement
transition, conjectured to set in beyond a critical end point in the QCD phase
diagram, is often related to an entropic transition and the apparently settled
gas-liquid transition in nuclear matter is an enthalphic transition, the conceivable
local isentropes w.r.t. “incoming” or “outgoing” serve as another useful guide
for discussing possible implications, both in the presumed hydrodynamical
expansion stage of heavy-ion collisions and the core-collapse of supernova
explosions. Examples, such as the quark-meson model and two-phase models, are
shown to distinguish concisely the different transitions.