Constraining the QCD Phase Diagram by Tricritical Lines at Imaginary Chemical Potential

Journal Article · Fri Oct 08 04:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.152001· OSTI ID:21467011

Forcrand, Philippe de ^[1]; Philipsen, Owe ^[2]

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1. Institut fuer Theoretische Physik, ETH Zuerich, CH-8093 Zuerich (Switzerland)
2. Institut fuer Theoretische Physik, Johann-Wolfgang-Goethe-Universitaet, 60438 Frankfurt am Main (Germany)

We present unambiguous evidence, from lattice simulations of QCD with three degenerate quark species, for two tricritical points in the (T,m) phase diagram at fixed imaginary chemical potential {mu}/T=i{pi}/3 mod2{pi}/3, one in the light and one in the heavy mass regime. These represent the boundaries of the chiral and deconfinement critical lines continued to imaginary {mu}, respectively. It is demonstrated that the shape of the deconfinement critical line for real chemical potentials is dictated by tricritical scaling and implies the weakening of the deconfinement transition with real chemical potential. The generalization to nondegenerate and light quark masses is discussed.

• OSTI ID: 21467011
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 105; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

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DIAGRAMS
EXTENDED PARTICLE MODEL
FERMIONS
FIELD THEORIES
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