Zero-range potentials with Inner structure: fitting parameters for resonance scattering

Details Zero-range potentials with Inner structure: fitting parameters for resonance scattering Zero-range potentials with Inner structure: fitting parameters for resonance scattering

2003-06-23

arxiv.org/abs/quant-ph/0306150v1

Physics

Quantum Physics

36 pages

Scientific paper

The solution of the classical Fermi problem of low-energy neutron scattering by nuclei, when the excitations of the nuclei in scattering processes are taken into account, is found by the method of zero-range potentials with inner structure. This model is a generalization of the Fermi zero-range potential obtained by adding a non-trivial inner Hamiltonian and inner space with indefinite metric. We propose a general principle of analyticity of the Caley-transform of the S-scattering matrix, written as a function of wave number. This permits us to evaluate all parameters of the model, including the indefinite metric tensor of the inner space, once the spectrum of the inner Hamiltonian, the scattering length and the effective radious are chosen.

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