Neutral mesons and disconnected diagrams in Twisted Mass QCD

Details Neutral mesons and disconnected diagrams in Twisted Mass QCD Neutral mesons and disconnected diagrams in Twisted Mass QCD

2007-09-28

arxiv.org/abs/0709.4564v1

PoSLAT2007:122,2007

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, presented at Lattice 2007, Regensburg, Germany

Scientific paper

We evaluate properties of neutral mesons in Nf=2 dynamical simulations of TMQCD at maximal twist. The pion is explored - establishing the size of the isospin splitting (an order a^2 effect). We investigate the eta' (the Nf=2 flavour singlet pseudoscalar meson) and neutral rho and scalar mesons. We show that disconnected diagrams can be evaluated very efficiently in TMQCD using variance reduction methods.

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