Proton-3He elastic scattering at low energies and the "A_y Puzzle"

TL;DR

This paper applies advanced computational methods to study low-energy proton-3He elastic scattering, aiming to resolve discrepancies in analyzing the A_y observable through various interaction models.

Contribution

It introduces a novel application of the hyperspherical harmonic technique combined with chiral perturbation theory to address the A_y puzzle in p-3He scattering.

Findings

Reduction of discrepancy in A_y observable with chiral N2LO interaction

Comparison of calculations with recent phase shift analysis and experimental data

Preliminary results using multiple interaction models

Abstract

The Kohn variational principle and the hyperspherical harmonic technique are applied to study p-3He elastic scattering at low energies. Preliminary results obtained using several interaction models are reported. The calculations are compared to a recent phase shift analysis performed at the Triangle University Nuclear Laboratory and to the available experimental data. Using a three-nucleon interaction derived from chiral perturbation theory at N2LO, we have found a noticeable reduction of the discrepancy observed for the A_y observable.