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Neutral mesons and disconnected diagrams in Twisted Mass QCD
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Neutral mesons and disconnected diagrams in Twisted Mass QCD
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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.
Forward citations
Cited by 1 Pith paper
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Pion Transition Form Factor in Lattice QCD
The disconnected quark-loop contribution to the pion transition form factor has the same sign as the connected contribution, at roughly 1% of its size, as calculated on one N_f=2+1 clover ensemble.
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