Nucleon form factors and moments of parton distributions in twisted mass lattice QCD

Details Nucleon form factors and moments of parton distributions in twisted mass lattice QCD Nucleon form factors and moments of parton distributions in twisted mass lattice QCD

2011-12-29

arxiv.org/abs/1201.0021v1

Physics

High Energy Physics

High Energy Physics - Lattice

Talk presented in the XXIst International Europhysics Conference on High Energy Physics, 21-27 July 2011, Grenoble, Rhones Alp

Scientific paper

We present results on the electroweak form factors and on the lower moments of parton distributions of the nucleon, within lattice QCD using two dynamical flavors of degenerate twisted mass fermions. Results are obtained on lattices with three different values of the lattice spacings, namely a=0.089 fm, a=0.070 fm and a=0.056 fm, allowing the investigation of cut-off effects. The volume dependence is examined by comparing results on two lattices of spatial length L=2.1 fm and L=2.8 fm. The simulations span pion masses in the range of 260-470 MeV. Our results are renormalized non-perturbatively and the values are given in the MS-scheme at a scale mu=2 GeV.

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