The pion-nucleon sigma term with N_f=2+1 O(a)-improved Wilson fermions

2022/12/22 by Agadjanov, Andria, Djukanovic, Dalibor, von Hippel, Georg +3
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat)

paper · doi:10.48550/arxiv.2212.11828

Abstract

We present an analysis of the pion-nucleon sigma term on the CLS ensembles with N_f=2+1 flavors of O(a)-improved Wilson fermions. We perform a chiral interpolation based on ensembles with pion masses ranging from 130 MeV to roughly 350 MeV. The analysis covers four lattice spacings between a≈ [0.05 \rmfm… 0.09 \rmfm], allowing for an estimate of systematics associated with lattice artefacts.

Related

• Sigma terms of the baryon octet in N_f = 2+1 QCD with Wilson quarks
• Strange nucleon form factors with N_f = 2 + 1 O(a)-improved Wilson\n fermions
• Nucleon Charges and Sigma Terms from N_f=2+1 QCD
• Isovector Axial Vector Form Factors of the Nucleon from Lattice QCD with\n N_f=2+1 mathcal O(a)-improved Wilson Fermions
• The pion scalar form factor with N_f=2+1 Wilson fermions