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arxiv: 1211.0253 · v1 · pith:RXIGMHTGnew · submitted 2012-11-01 · ✦ hep-lat

Nucleon structure with pion mass down to 149 MeV

classification ✦ hep-lat
keywords nucleonpionachieveactionanalysisaxialchargeschiral
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We present isovector nucleon observables: the axial, tensor, and scalar charges and the Dirac radius. Using the BMW clover-improved Wilson action and pion masses as low as 149 MeV, we achieve good control over chiral extrapolation to the physical point. Our analysis is done using three different source-sink separations in order to identify excited-state effects, and we make use of the summation method to reduce their size.

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