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arxiv: 1201.2787 · v1 · pith:IJA6QHRKnew · submitted 2012-01-13 · ✦ hep-lat

Systematic errors in partially-quenched QCD plus QED lattice simulations

Antonin Portelli , Stephan D\"urr , Zolt\'an Fodor , Julien Frison , Christian Hoelbling , Sandor D. Katz , Stefan Krieg , Thorsten Kurth
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Laurent Lellouch Thomas Lippert Alberto Ramos K\'alm\'an K. Szab\'o
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classification ✦ hep-lat
keywords electromagneticeffectserrorslatticesystematicassociatedbecomingbudapest-marseille-wuppertal
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At the precision reached in current lattice QCD calculations, electromagnetic effects are becoming numerically relevant. Here, electromagnetic effects are included by superimposing $\mathrm{U}(1)$ degrees of freedom on $N_f = 2+1$ QCD configurations from the Budapest-Marseille-Wuppertal Collaboration. We present preliminary results for the electromagnetic corrections to light pseudoscalars mesons masses and discuss some of the associated systematic errors.

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