منابع مشابه
Twisted mass QCD for the pion electromagnetic form factor
The pion form factor is computed using quenched twisted mass QCD and the GMRES-DR matrix inverter. The momentum averaging procedure of Frezzotti and Rossi is used to remove leading lattice spacing artifacts, and numerical results for the form factor show the expected improvement with respect to the standard Wilson action. Although some matrix inverters are known to fail when applied to twisted ...
متن کاملPion mass splitting and phase structure in Twisted Mass QCD
In the framework of Wilson Chiral Perturbation Theory [1], we study the effect induced by a twisted Wilson term, as it appears in Twisted Mass QCD [2] (with 2 degenerate quarks). In particular we consider the vacuum orientation and the pion masses. The computations are done to NLO both in the mass and in the lattice spacing (i.e. to O(a)). There are no restrictions on the relative size of latti...
متن کاملScaling and chiral extrapolation of pion mass and decay constant with maximally twisted mass QCD
We present an update of the results for pion mass and pion decay constant as obtained by the ETM collaboration in large scale simulations with maximally twisted mass fermions and two mass degenerate flavours of light quarks. We discuss the continuum, chiral and infinite volume extrapolation of these quantities as well as the extraction of low energy constants, and investigate possible systemati...
متن کاملTwisted mass lattice QCD
I review the theoretical foundations, properties as well as the simulation results obtained so far of a variant of the Wilson lattice QCD formulation: Wilson twisted mass lattice QCD. Emphasis is put on the discretization errors and on the effects of these discretization errors on the phase structure for Wilson-like fermions in the chiral limit. The possibility to use in lattice simulations dif...
متن کاملTwisted mass Lattice QCD
In this contribution I review lattice formulations based on so-called twisted mass (tm) Wilson quarks, focusing on the general properties and problems that in my opinion are most relevant for on-going studies and applications to physics . The simplest of these formulations, which corresponds to QCD with one mass degenerate quark doublet, was introduced in ref. [1] as a way to get rid of the spu...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2005
ISSN: 0920-5632
DOI: 10.1016/j.nuclphysbps.2004.11.380