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Nucleon electromagnetic and axial form factors with N_f=2 twisted mass fermions at the physical point

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arxiv 1702.00984 v1 pith:HJKTDATT submitted 2017-02-03 hep-lat

Nucleon electromagnetic and axial form factors with N_f=2 twisted mass fermions at the physical point

classification hep-lat
keywords factorsformmassnucleonaxialelectromagneticmagnetictwisted
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present results for the nucleon electromagnetic and axial form factors using an N$_f$=2 twisted mass fermion ensemble with pion mass of about 131 MeV. We use multiple sink-source separations to identify excited state contamination. Dipole masses for the momentum dependence of the form factors are extracted and compared to experiment, as is the nucleon magnetic moment and charge and magnetic radii.

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