# Flavour Breaking Effects of Wilson twisted mass fermions

Jansen, K, McNeile, C, Michael, C, Nagai, K, Papinutto, M, Pickavance, J, Shindler, A, Urbach, C and Wetzorke, I
(2005) Flavour Breaking Effects of Wilson twisted mass fermions. Phys.Lett.B, 624 (3-4). pp. 334-341.

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## Abstract

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.

Item Type: Article 15 pages, 2 figures hep-lat, hep-lat ?? QC ?? Faculty of Science and Engineering > School of Physical Sciences > Mathematical Sciences Symplectic Admin 18 Aug 2008 12:58 17 Dec 2022 01:35 10.1016/j.physletb.2005.08.029 https://livrepository.liverpool.ac.uk/id/eprint/413