Abstract
Nucleon sigma terms are fundamental properties of the nucleons and are important input quantities for direct dark matter detection experiments. Here we present a determination of these sigma terms directly from the underlying theory. We use the lattice formulation of QCD to non-perturbativley calculate the quark mass dependence of the nucleon mass and the Feynman-Hellmann theorem to deduce the sigma terms. We present results for the up, down, and strange sigma terms of the proton and neutron.
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