TY  - CONF
A1  - Philipsen, Owe
A1  - Forcrand, Philippe de
T1  - Constraints for the QCD phase diagram from imaginary chemical potential
T2  - Proceedings of Science
N2  - We present unambiguous evidence from lattice simulations of Nf = 3 QCD for two tricritical points in the (T;m) phase diagram at fixed imaginary m=T = ip=3 mod. 2p=3, one in the light and one in the heavy quark regime. Together with similar results in the literature for Nf = 2 this implies the existence of a chiral and of a deconfinement tricritical line at those values of imaginary chemical potentials. These tricritical lines represent the boundaries of the analytically continued chiral and deconfinement critical surfaces, respectively, which delimit the parameter space with first order phase transitions. It is demonstrated that the shape of the deconfinement critical surface is dictated by tricritical scaling and implies the weakening of the deconfinement transition with real chemical potential. A qualitatively similar effect holds for the chiral critical surface.
Y1  - 2012
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/27320
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-273206
SN  - 1824-8039
N1  - The XXVIII International Symposium on Lattice Field Theory, Lattice2010 June 14-19, 2010 Villasimius, Italy
VL  - 2010
IS  - (Lattice 2010)211
SP  - 1
EP  - 7
PB  - Scuola Internazionale Superiore di Studi Avanzati
CY  - Trieste
ER  -