On the phase structure of twisted mass lattice QCD | Zendy

Gernot MÃÂ ⁄ nster | Zendy

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On the phase structure of twisted mass lattice QCD

Author(s) -

Gernot MÃÂ ⁄ nster

Publication year - 2004

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2004/09/035

Subject(s) - chiral perturbation theory , quantum chromodynamics , physics , lattice (music) , lattice qcd , fermion , particle physics , quark , lattice field theory , perturbation theory (quantum mechanics) , theoretical physics , acoustics

The introduction of a chirally twisted mass term has been proposed as anattractive approach to O(a) improvement of Quantum Chromodynamics with Wilsonfermions on a lattice. For numerical simulation projects it is important toknow the phase structure of the theory in the region of small quark masses. Westudy this question in the framework of chiral perturbation theory.Generalizing the analysis of Sharpe and Singleton we find extensions of normaland Aoki phase scenarios and a possible new phase with spontaneous breakdown ofchiral symmetry to a discrete $Z_2$.Comment: 10 pages, 6 Postscript figures, LaTeX2

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