Sigma-terms and axial charges for hyperons and charmed baryons

TL;DR

This paper calculates sigma-terms and axial charges for hyperons and charmed baryons using twisted mass fermions, comparing fixed current and stochastic methods for three-point functions.

Contribution

It provides new lattice QCD results for hyperons and charmed baryons' sigma-terms and axial charges, including a comparison of computational methods.

Findings

Results for sigma-terms and axial charges are presented.

Comparison between fixed current and stochastic methods shows consistency.

Provides data at a pion mass of 373 MeV.

Abstract

We present results for the $\sigma$-terms and axial charges for various hyperons and charmed baryons using $N_f=2+1+1$ twisted mass fermions. For the computation of the three-point function we use the fixed current method. For one of the $N_f=2+1+1$ ensembles with pion mass of 373 MeV we compare the results of the fixed current method with those obtained with a stochastic method for computing the all-to-all propagator involved in the evaluation of the three point functions.