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The European Physical Journal A

, Volume 32, Issue 2, pp 127–137 | Cite as

Nuclear forces with Δ excitations up to next-to-next-to-leading order, part I: Peripheral nucleon-nucleon waves

  • H. Krebs
  • E. EpelbaumEmail author
  • U. -G. Meißner
Regular Article - Nuclear Structure and Reactions

Abstract.

We study the two-nucleon force at next-to-next-to-leading order in a chiral effective field theory with explicit Δ 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.

PACS.

13.75.Cs Nucleon-nucleon interactions (including antinucleons, deuterons, etc.) 21.30.-x Nuclear forces 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  1. 1.Forschungszentrum JülichInstitut für Kernphysik (Theorie)JülichGermany
  2. 2.Universität BonnHelmholtz-Institut für Strahlen- und Kernphysik (Theorie)BonnGermany

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