Refinement of the $n-\alpha$ and $p-\alpha$ fish-bone potential

TL;DR

This paper refines the fishbone potential model for composite particles, specifically for neutron-alpha and proton-alpha interactions, by fitting to experimental phase shifts and demonstrating that a double Gaussian local potential accurately describes these interactions across all partial waves.

Contribution

It introduces a refined fishbone potential model with a double Gaussian parametrization that effectively fits experimental phase shifts for n-alpha and p-alpha systems.

Findings

Double Gaussian potential describes phase shifts for all partial waves.

Refined fishbone potential accurately models Pauli effects in composite particles.

Model fits experimental data well across different partial waves.

Abstract

The fishbone potential of composite particles simulates the Pauli effect by nonlocal terms. We determine the $n-\alpha$ and $p-\alpha$ fish-bone potential by simultaneously fitting to the experimental phase shifts. We found that with a double Gaussian parametrization of the local potential can describe the $n-\alpha$ and $p-\alpha$ phase shifts for all partial waves.