Matrix elements and baryon spectroscopy from unquenched lattice QCD with improved staggered quarks

TL;DR

This paper investigates how open decay channels influence baryon masses using unquenched lattice QCD with improved staggered quarks, employing variational smearing and analyzing specific current signals.

Contribution

It introduces a method combining variational smearing with improved staggered fermions to study decay effects on baryon masses in unquenched lattice QCD.

Findings

Evidence of decay channel effects on baryon masses

Successful application of variational smearing techniques

Analysis of s_bar s current in nucleon

Abstract

We look for the effect of open decay channels on the masses of baryons in unquenched lattice QCD. We apply variational smearing using fuzzed basis states to a staggered nucleon operator. The signal for the s_bar s current in the nucleon is studied. The lattice calculations are done using improved staggered fermions.