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

M. Viviani, L. Girlanda, A. Kievsky, L. E. Marcucci, S. Rosati

Published 2010-04-08Version 1

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.