Nucleon-Nucleon Chiral Two Pion Exchange potential vs Coarse grained interactions

TL;DR

This paper compares chiral two-pion exchange nucleon-nucleon potentials with coarse-grained delta-shell models, showing reduced parameters with chiral contributions but emphasizing the need for detailed error analysis in interaction improvements.

Contribution

It introduces a combined analysis of chiral two-pion exchange and coarse-grained short-range interactions, highlighting parameter reduction and the importance of comprehensive error assessment.

Findings

Parameter reduction with chiral two-pion exchange

Need for detailed error analysis in potential improvements

Computed deuteron properties and form factors with error propagation

Abstract

We analyse the interplay between nucleon-nucleon potentials deduced from chiral perturbation theory and a coarse grained representation of the short distance interactions by delta-shells potentials below a certain cut-off distance. While we find that the number of parameters is greatly reduced when Chiral Two Pion Exchange contributions are included we also observe that discerning the necessity of improvements on the interaction requires a detailed analysis of all error sources. Our points are best illustrated by computing deuteron static properties as well as electromagnetic form factors after error propagation.