Low-momentum interactions in three- and four-nucleon scattering

TL;DR

This paper investigates how low-momentum two-nucleon interactions, derived via renormalization group methods, influence three- and four-nucleon scattering observables and their sensitivity to short-range many-body forces.

Contribution

It analyzes the cutoff dependence of 3N and 4N scattering using RG-derived interactions, highlighting the role of induced many-body forces.

Findings

Residual cutoff dependence indicates sensitivity to omitted short-range forces.

RG methods help estimate the impact of many-body forces on scattering observables.

Study provides insights into the role of induced forces in few-nucleon systems.

Abstract

Low momentum two-nucleon interactions obtained with the renormalization group method and the similarity renormalization group method are used to study the cutoff dependence of low energy 3N and 4N scattering observables. The residual cutoff dependence arises from omitted short-ranged 3N (and higher) forces that are induced by the renormalization group transformations, and may help to estimate the sensitivity of various 3N and 4N scattering observables to short-ranged many-body forces.