On the phase structure of twisted mass lattice QCD

Details On the phase structure of twisted mass lattice QCD On the phase structure of twisted mass lattice QCD

2004-07-05

arxiv.org/abs/hep-lat/0407006v1

JHEP 0409:035,2004

Physics

High Energy Physics

High Energy Physics - Lattice

10 pages, 6 Postscript figures, LaTeX2e

Scientific paper

10.1088/1126-6708/2004/09/035

The introduction of a chirally twisted mass term has been proposed as an attractive approach to O(a) improvement of Quantum Chromodynamics with Wilson fermions on a lattice. For numerical simulation projects it is important to know the phase structure of the theory in the region of small quark masses. We study this question in the framework of chiral perturbation theory. Generalizing the analysis of Sharpe and Singleton we find extensions of normal and Aoki phase scenarios and a possible new phase with spontaneous breakdown of chiral symmetry to a discrete $Z_2$.

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