Some remarks on O(a) improved twisted mass QCD

2001/10/16 by Roberto Frezzotti, Stefan Sint
Physics and Astronomy · #hep-lat

paper · pdf

published as Nucl.Phys.Proc.Suppl. 106 (2002) 814-816 · Lattice2001(improvement), 3 pages

arxiv created 2001/10/16 · arxiv updated 2009/11/30

Abstract

Twisted mass QCD (tmQCD) has been introduced as a solution to the problem of unphysical fermion zero modes in lattice QCD with quarks of the Wilson type. We here argue that O(a) improvement of the tmQCD action and simple quark bilinear operators can be more economical than in the standard framework. In particular, an improved and renormalized estimator of the pion decay constant in two-flavour QCD is available, given only the Sheikholeslami-Wohlert coefficient c_sw and an estimate of the critical mass m_c.

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