Scalar and axial matrix elements of the nucleon: sea quark content
Apoorva Patel
TL;DR
This paper investigates the contributions of sea quarks to the scalar and axial properties of the nucleon using lattice QCD with two dynamical Wilson fermions, comparing results across different fermion formulations and heavy quark expansions.
Contribution
It provides new lattice QCD calculations of sea quark effects on nucleon matrix elements with Wilson fermions, contrasting with staggered fermion results and heavy quark expansion trends.
Findings
Sea quark contributions to scalar and axial matrix elements are quantified.
Results are compared between Wilson and staggered fermion formulations.
Insights into heavy quark mass expansion trends are discussed.
Abstract
Sea quark contributions to the scalar density and the axial current matrix elements of the nucleon are studied in lattice qcd with two flavours of dynamical wilson fermions. the results are compared to trends in heavy quark mass expansions, and contrasted with the numbers obtained using dynamical staggered fermions.
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