Nucleon form factors with Nf=2 dynamical twisted mass fermions

C. Alexandrou (U. of Cyprus & Cyprus Institute) , T. Korzec (U. of Cyprus) , G. Koutsou (U. of Cyprus & Wuppertal) , R. Baron (Saclay) , P. Guichon (Saclay) , M. Brinet (U. of Grenoble) , J. Carbonell (U. of Grenoble) , P.-A. Harraud (U. of Grenaoble)

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K. Jansen (DESY-Zeuthen)

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classification ✦ hep-lat hep-phnucl-exnucl-th

keywords nucleonaxialfactorsfermionsformmassresultstwisted

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We present results on the electromagnetic and axial nucleon form factors using two degenerate flavors of twisted mass fermions on lattices of spatial size 2.1 fm and 2.7 fm and a lattice spacing of about 0.09 fm. We consider pion masses in the range of 260-470 MeV. We chirally extrapolate results on the nucleon axial ch arge, the isovector Dirac and Pauli root mean squared radii and magnetic moment to the physical point and co mpare to experiment.

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Nucleon form factors with Nf=2 dynamical twisted mass fermions

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