Renormalization of proton-proton fusion in chiral effective field theory

TL;DR

This paper investigates the renormalization of proton-proton fusion within chiral effective field theory, emphasizing perturbative corrections and the potential enhancement of contact axial current operators, supporting previous proposals.

Contribution

It provides evidence for promoting a contact axial current operator, advancing the understanding of proton-proton fusion in chiral effective field theory.

Findings

Support for promoting a contact axial current operator

Perturbative treatment of subleading corrections applied

Evidence aligning with previous literature proposal

Abstract

Renormalization of proton-proton fusion is studied in the framework of chiral effective field theory. Strict perturbative treatment of subleading corrections is applied in the analysis. Possible enhancement of two-nucleon contact axial current operators is the focus of the study. We find evidence that supports a previous proposal in the literature to promote one of the contact axial current operators.