Partially quenched study of strange baryon with Nf = 2 twisted mass fermions

TL;DR

This study computes the masses of strange baryons using two-flavor twisted mass fermions, analyzing effects of lattice spacing and quark mass variations to improve understanding of baryon properties in lattice QCD.

Contribution

It provides a partially quenched analysis of strange baryon masses with twisted mass fermions, including chiral extrapolation and assessment of lattice artifacts.

Findings

Baryon masses obtained for pion masses 270-500 MeV.

Assessment of cut-off effects and isospin breaking.

Chiral extrapolation results for octet baryons and Omega.

Abstract

We present results on the mass of the baryon octet and decuplet using two flavors of light dynamical twisted mass fermions. The strange quark mass is fixed to its physical value from the kaon sector in a partially quenched set up. Calculations are performed for light quark masses corresponding to a pion mass in the range 270-500 MeV and lattice sizes of 2.1 fm and 2.7 fm. We check for cut-off effects and isospin breaking by evaluating the baryon masses at two different lattice spacings. We carry out a chiral extrapolation for the octet baryons and discuss results for the Omega.