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First moments of the nucleon generalized parton distributions from lattice QCD

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arxiv 1203.6579 v1 pith:G3KLCMMT submitted 2012-03-29 hep-lat

A. Sternbeck , M. Göckeler , Ph. Hägler , R. Horsley , Y. Nakamura , A. Nobile , D. Pleiter , P.E.L. Rakow
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A. Schäfer G. Schierholz J. Zanotti
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keywords generalizeddistributionsfirstlatticemomentsnucleonpartonresults
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We report on our lattice calculations of the nucleon's generalized parton distributions (GPDs), concentrating on their first moments for the case of N_f=2. Due to recent progress on the numerical side we are able to present results for the generalized form factors at pion masses as low as 260 MeV. We perform a fit to one-loop covariant baryon chiral perturbation theory with encouraging results.

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