Significance of chiral three-nucleon force contact terms for understanding of elastic nucleon-deuteron scattering

We investigate the importance of the three-nucleon (3N) force contact terms in elastic nucleon-deuteron (Nd) scattering by applying the N\(^4\)LO\(^+\) chiral semi-local momentum space (SMS) regularized nucleon-nucleon (NN) chiral potential supplemented by N\(^2\)LO and all subleading N\(^4\)LO thre...

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Bibliographic Details
Published in:arXiv.org 2022-03
Main Authors: Witała, H, Golak, J, Skibiński, R
Format: Article
Language:English
Subjects:
Deuterons
Elastic scattering
Nucleons
Parameters
Pions
Online Access:Get full text
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Summary:We investigate the importance of the three-nucleon (3N) force contact terms in elastic nucleon-deuteron (Nd) scattering by applying the N\(^4\)LO\(^+\) chiral semi-local momentum space (SMS) regularized nucleon-nucleon (NN) chiral potential supplemented by N\(^2\)LO and all subleading N\(^4\)LO three-nucleon force (3NF) contact terms. Strength parameters of the contact terms were obtained by least squares fitting of theoretical predictions to cross section and analyzing powers data at three energies of the impinging nucleon. Although the N\(^3\)LO contributions to the 3N force were completely neglected, the results calculated with the contact terms multiplied by the fitted strength parameters yield an improved description of the elastic Nd scattering observables in a wide range of incoming nucleon energies below the pion production threshold.
ISSN:2331-8422
DOI:10.48550/arxiv.2203.08499