Nuclear forces with Delta-excitations up to next-to-next-to-leading order I: peripheral nucleon-nucleon waves
Nuclear Theory
2008-11-26 v1
Abstract
We study the two-nucleon force at next-to-next-to-leading order in a chiral effective field theory with explicit Delta degrees of freedom. Fixing the appearing low-energy constants from a next-to-leading order calculation of pion-nucleon threshold parameters, we find an improved convergence of most peripheral nucleon-nucleon phases compared to the theory with pions and nucleons only. In the delta-full theory, the next-to-leading order corrections are dominant in most partial waves considered.
Keywords
Cite
@article{arxiv.nucl-th/0703087,
title = {Nuclear forces with Delta-excitations up to next-to-next-to-leading order I: peripheral nucleon-nucleon waves},
author = {Hermann Krebs and Evgeny Epelbaum and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:nucl-th/0703087},
year = {2008}
}
Comments
16 pages, 10 figures