"Luneburg-lens-like structural Pauli attractive core of the nuclear force at short distances" [arXiv:1703.09396]

TL;DR

This paper discusses a deeply attractive nucleon-nucleon potential that reproduces phase shifts but predicts rapid decay of the deuteron via pion emission, questioning its physical realism.

Contribution

It highlights the limitations of deeply attractive potentials by showing their unphysical prediction of deuteron decay, contrasting with previous phase shift fits.

Findings

Deeply attractive potential reproduces phase shifts.

Predicted rapid decay of deuteron via pion emission.

Questions physical validity of such potentials.

Abstract

A recent paper [S. Ohkubo, Phys. Rev. C 95, 044002 (2017)] found that the measured 1S0 phase shifts can be reproduced using a deeply attractive nucleon-nucleon potential. We find that the deuteron would decay strongly via pion emission to the deeply bound state arising in this potential. There- fore the success of a deeply attractive potential in describing phase shifts must be regarded only as an interesting curiosity.