Effect of three-nucleon interaction in p-3He elastic scattering

TL;DR

This study investigates how different three-nucleon interaction models influence p-3He elastic scattering at low energies, showing that including these forces improves agreement with experimental data, especially for analyzing powers.

Contribution

It compares two three-nucleon interaction models in p-3He scattering and demonstrates their impact on theoretical predictions versus experimental results.

Findings

Including three-nucleon forces improves data agreement.

Both models enhance the prediction of analyzing powers.

The phenomenological model yields comparable results to the EFT-based model.

Abstract

We present a detailed study of the effect of different three-nucleon interaction models in p-3He elastic scattering at low energies. In particular, 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 harmonics technique and the results are compared with available experimental data. We have found that the inclusion of either one of the other force model improves the agreement with the experimental data, in particular for the proton vector analyzing power.