Effective range function below threshold
نویسنده
چکیده
We demonstrate that the kernel of the Lippmann-Schwinger equation, associated with interactions consisting of a sum of the Coulomb plus a short range nuclear potential, below threshold becomes degenerate. Taking advantage of this fact, we present a simple method of calculating the effective range function for negative energies. This may be useful in practice since the effective range expansion extrapolated to threshold allows to extract the lowenergy scattering parameters: the Coulomb modified scattering length and the effective range. PACS numbers: 03.65.Ge, 02.03.Rz, 21.10.Sf, 36.10.Gv † email: [email protected] Effective range function below threshold 2
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