Unquenched simulations of four-nucleon interactions

TL;DR

This paper presents exploratory unquenched simulations of four-nucleon interactions, incorporating internal nucleon loops, and analyzes their effects on nucleon properties without encountering issues common in quenched approaches.

Contribution

It introduces unquenched lattice simulations for four-nucleon interactions, including dynamical effects of nucleon loops, which enhances the reliability of the results over quenched methods.

Findings

Nucleon mass and scalar field lengths depend on hopping parameter and Yukawa coupling.

No issues with exceptional configurations at strong couplings.

Unquenched simulations are feasible and reliable for four-nucleon interactions.

Abstract

Exploratory simulations of four-nucleon interactions are performed taking into account the dynamical effects of internal nucleon loops. The four-nucleon interactions in the isoscalar and isovector channels are described by Yukawa interactions with auxiliary scalar fields. The nucleon mass and the average field lengths of the scalar fields are determined as a function of nucleon hopping parameter and Yukawa coupling strengths. There are no problems with "exceptional configurations" at strong couplings which make quenched simulations unreliable.