Three-pion exchange nucleon-nucleon potentials with virtual Δ-isobar excitation

N. Kaiser
Phys. Rev. C 92, 024002 – Published 10 August 2015

Abstract

The nucleon-nucleon interaction arising from the exchange of three pions and the excitation of Δ(1232) isobars in intermediate states is studied. Approximating the Δ propagator by the inverse ΔN mass-splitting, analytical expressions are derived for the spectral functions of the isoscalar and isovector central, spin-spin, and tensor NN potentials in momentum-space. A translation of the spectral functions into coordinate-space potentials reveals that the main effect of these specific exchange and excitation mechanisms is a repulsive isoscalar central NN potential.

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  • Received 20 April 2015
  • Revised 11 May 2015

DOI:https://doi.org/10.1103/PhysRevC.92.024002

©2015 American Physical Society

Authors & Affiliations

N. Kaiser

  • Physik-Department T39, Technische Universität München, D-85747 Garching, Germany

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Issue

Vol. 92, Iss. 2 — August 2015

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