Effective Theory of the Triton

Details Effective Theory of the Triton Effective Theory of the Triton

1999-06-14

arxiv.org/abs/nucl-th/9906032v4

Nucl.Phys. A676 (2000) 357-370

Physics

Nuclear Physics

Nuclear Theory

16 pages, Latex, 7 PS figures included with epsf.sty, discussion and references added, conclusions unchanged

Scientific paper

10.1016/S0375-9474(00)00205-0

We apply the effective field theory approach to the three-nucleon system. In particular, we consider S=1/2 neutron-deuteron scattering and the triton. We show that in this channel a unique nonperturbative renormalization takes place which requires the introduction of a single three-body force at leading order. With one fitted parameter we find a good description of low-energy data. Invariance under the renormalization group explains some universal features of the three-nucleon system ---such as the Thomas and Efimov effects and the Phillips line--- and the origin of SU(4) symmetry in nuclei.

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