Flavour Breaking Effects of Wilson twisted mass fermions

Details Flavour Breaking Effects of Wilson twisted mass fermions Flavour Breaking Effects of Wilson twisted mass fermions

2005-07-22

arxiv.org/abs/hep-lat/0507032v1

Phys.Lett.B624:334-341,2005

Physics

High Energy Physics

High Energy Physics - Lattice

15 pages, 2 figures

Scientific paper

10.1016/j.physletb.2005.08.029

We study the flavour breaking effects appearing in the Wilson twisted mass formulation of lattice QCD. In this quenched study, we focus on the mass splitting between the neutral and the charged pion, determining the neutral pion mass with a stochastic noise method to evaluate the disconnected contributions. We find that these disconnected contributions are significant. Using the Osterwalder-Seiler interpretation of the connected piece of the neutral pion correlator, we compute the corresponding neutral pion mass to study with more precision the scaling behaviour of the mass splitting.

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