EPJ Web of Conferences 3, 05011 (2010)
https://doi.org/10.1051/epjconf/20100305011

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

¹ INFN, Sezione di Pisa, Largo Pontecorvo, 3, 56127 Pisa ( Italy )
² Phys. Dept., University of Pisa, Largo Pontecorvo, 3, 56127 Pisa ( Italy )

^a e-mail: michele.viviani@pi.infn.it

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.