Effect of three nucleon forces in p-3He scattering

TL;DR

This study investigates how different three-nucleon force models influence proton-3He elastic scattering at low energies, showing improved agreement with experimental data when including these forces, especially for analyzing power A_y.

Contribution

It compares two models of three-nucleon forces and demonstrates their impact on scattering observables, enhancing understanding of nuclear interactions.

Findings

Including 3N forces improves agreement with experimental data.

Both models enhance the description of the proton vector analyzing power A_y.

Results support the significance of three-nucleon forces in nuclear scattering.

Abstract

The effect of the inclusion of different models of three nucleon (3N) forces in p-3He elastic scattering at low energies is studied. Two models have been considered: one derived from effective field theory at next-to-next-to-leading order and one derived from a more phenomenological point of view -- the so-called Illinois model. The four nucleon scattering observables are calculated using the Kohn variational principle and the hyperspherical harmonic technique and the results are compared with available experimental data. We have found that with the inclusion of both 3N force models the agreement with the experimental data is improved, in particular for the proton vector analyzing power A_y.