Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2008-09-30
PoS LATTICE2008:206,2008
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 7 figures, talk given at the XXVI International Symposium on Lattice Field Theory, July 14 --19, 2008, Williamsburg,
Scientific paper
We report progress in our exploration of the finite-temperature phase structure of two-flavour lattice QCD with twisted-mass Wilson fermions and a tree-level Symanzik-improved gauge action for a temporal lattice size N_{\tau}=8. Extending our investigations to a wider region of parameter space we gain a global view of the rich phase structure. We identify the finite temperature transition/crossover for a non-vanishing twisted-mass parameter in the neighbourhood of the zero-temperature critical line at sufficiently high \beta. Our findings are consistent with Creutz's conjecture of a conical shape of the finite temperature transition surface. Comparing with NLO lattice chiral perturbation theory we achieve an improved understanding of this shape.
Ilgenfritz Ernst-Michael
Jansen Karl
Lombardo Maria Paola
Muller-Preussker Michael
Petschlies Marcus
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