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We present 2+1 flavor Lattice QCD calculations of the nucleon scalar andtensor charges. Using the BMW clover-improved Wilson action with pion massesbetween 150 and 350 MeV and three source-sink separations between 0.9 and 1.4fm, we achieve good control over excited-state contamination and extrapolationto the physical pion mass. As a consistency check, we also present results fromcalculations using unitary domain wall fermions with pion masses between 300and 400 MeV, and using domain wall valence quarks and staggered sea quarks withpion masses between 300 and 600 MeV.

Nucleon Scalar and Tensor Charges from Lattice QCD with Light Wilson Quarks