Repulsive short range three-nucleon interaction

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Bulletin of the American Physical Society

OSTI ID:375038

Pena, M T; Riska, D O; Coon, S A

The three nucleon interaction (TNI) that arises from pion and the effective scalar and vector meson exchange components of the nucleon-nucleon interaction is constructed. The dominant terms of this TNI involve an intermediate nucleon-antinucleon pair and can be thought of as a {pi} - {open_quotes}{sigma}{close_quotes} exchange and a {pi} - {open_quotes}{omega}{close_quotes} exchange TNI. Using several wavefunction models they show that this interaction reduces the calculated binding energy of the trinucleon in perturbation theory. Their most consistent combination of this short range TNI and a triton wavefunction both derived from the Bonn OBEPQ reduces the triton binding energy by about 200 KeV (roughly a factor of 4 smaller than that of the Tucson-Melbourne {pi} - {rho} TNI with the OBEPQ wavefunction). These results are qualitatively unchanged by the corresponding TNIs that arise from the excitation of N(1440) resonances on the intermediate nucleon. The totality of these TNIs provide an amount of additional repulsion that approximately corresponds to that of the repulsive spin-independent phenomenological TNI of short range postulated in some studies of light nuclei.

• OSTI ID: 375038
• Report Number(s): CONF-9304297--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 2 Vol. 40; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
EXCHANGE INTERACTIONS
NUCLEON-NUCLEON INTERACTIONS
PIONS
SIGMA BARYONS
THREE-BODY PROBLEM
VECTOR MESONS