Three - body force in the triton

Details Three - body force in the triton Three - body force in the triton

Nov 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974phrvc..10.2067y&link_type=abstract

Physical Review C, vol. 10, Issue 5, pp. 2067-2079

Physics

43

Scientific paper

We have derived a two-pion-exchange three-body potential by using a chiral-invariant Lagrangian for the pion-nucleon interaction. Only the three dominant lowest-order processes which give rise to a three-body interaction are included: (a) The second pion is emitted before the first pion is absorbed and the nucleon which emits the second pion goes into a positive-energy state; (b) one nucleon exchanges a ρ meson with a pion; (c) one nucleon is scattered into an N*(1236). We then proceed to evaluate the contribution of this three-body potential to the binding energy of the triton using a variational triton wave function. It is found that the two-pion-exchange three-body potential gives a significant contribution (2.32 MeV) to the binding energy of a triton. NUCLEAR STRUCTURE 3He, 3H; calculated contribution of three-body force to binding energy.

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