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2010

Nucleon strange quark content in 2+1-flavor QCD

JLQCD Collaboration, Takeda, K., Aoki, S. et al.

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We calculate the strange quark content of the nucleon directly from its disconnected three-point function in N_f=2+1 QCD.

Chiral symmetry is crucial to avoid a possibly large contamination due to operator mixing, and is exactly preserved by employing the overlap quark action.
We also use the all-to-all quark propagator and the low-mode averaging technique in order to accurately calculate the relevant nucleon correlator.
Our preliminary result extrapolated to the physical point is f_{T_s} = 0.013(12)(16).

Nucleon strange quark content in 2+1-flavor QCD · Around

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