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Direct determinations of the nucleon and pionσterms at nearly physical quark masses

Bali, Gunnar S. ; Collins, Sara ; Richtmann, Daniel ; Schäfer, Andreas ; Söldner, Wolfgang ; Sternbeck, André



Abstract

We present a high statistics study of the pion and nucleon light and strange quark sigma terms using N-f = 2 dynamical nonperturbatively improved clover fermions with a range of pion masses down to m(pi) similar to 150 MeV and several volumes, Lm(pi) = 3.4 up to 6.7, and lattice spacings, a =0.06-0.08 fm, enabling a study of finite volume and discretization effects for m(pi) greater than or ...

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