Heavy quark mass expansion of vector and tensor currents and intrinsic charm in nucleon form factors

TL;DR

This paper uses subgraph expansion techniques to analyze how heavy quarks affect nucleon form factors, providing estimates for their influence on electromagnetic and tensor properties.

Contribution

It introduces a method to compute asymptotic expansions of vector and tensor currents for large quark masses, linking heavy quark effects to nucleon form factors.

Findings

Heavy quarks have a quantifiable impact on nucleon electromagnetic form factors.

The framework allows estimation of heavy quark contributions to nucleon tensor form factors.

Results provide insights into the role of intrinsic charm in nucleon structure.

Abstract

The framework of the expansion by subgraphs is used to compute asymptotic expansions for the vector and the tensor currents in the limit of large quark masses. We use the results to obtain an estimate for the influence of heavy quarks on the nucleon electromagnetic and tensor form factors.