Calculation of the nucleon sigma term and strange quark content with two flavors of dynamical overlap fermions

Understand

We present a calculation of the nucleon sigma term on two-flavor QCD configurations with dynamical overlap fermions.

• We analyse the lattice data for the nucleon mass using the baryon chiral perturbation theory.
• Using partially quenched data sets, we extract the connected and disconnected contributions to the nucleon sigma term separately.
• Chiral symmetry on the lattice simplifies the determination of the disconnected contribution.