Realistic two-baryon potential coupling two-nucleon and nucleon-Δ-isobar states: Fit and applications to three-nucleon system | Zendy

A. Deltuva | Zendy; R. Machleidt | Zendy; P. U. Sauer | Zendy

Open Access

Realistic two-baryon potential coupling two-nucleon and nucleon-Δ-isobar states: Fit and applications to three-nucleon system

Author(s) -

A. Deltuva,

R. Machleidt,

P. U. Sauer

Publication year - 2003

Publication title -

physical review c

Language(s) - English

Resource type - Journals

eISSN - 1089-490X

pISSN - 0556-2813

DOI - 10.1103/physrevc.68.024005

Subject(s) - nucleon , physics , isobar , nuclear physics , baryon , scattering , particle physics , charge (physics) , coupling (piping) , quantum mechanics , mechanical engineering , engineering

A two-baryon coupled-channel potential is developed. It couples two-nucleon states and states in which one nucleon is turned into aD isobar. It is developed as extension of the purely nucleonic charge-dependent ~CD! Bonn potential. It is fitted to two-nucleon scattering data up to 350 MeV nucleon lab energy. Since scattering energies just touch the pion-production threshold, the D isobar is considered a stable baryon. The resulting fit of the coupled-channel potential is of the same quality as that for CD Bonn. The coupled-channel potential is as realistic as CD Bonn and as any other modern two-nucleon potential. It is charge-dependent as CD Bonn. It is employed for the description of elastic and inelastic three-nucleon scattering. The D isobar yields an effective three-nucleon force in the three-nucleon system, besides other effects. D-isobar effects in threenucleon scattering are isolated and discussed.

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