Final state interactions and the extraction of neutron single spin asymmetries from SIDIS by a transversely polarized $^3$He target

Understand

The semi-inclusive deep inelastic electron scattering off transversely polarized $^3$He, i.e.

• the process, $e + \vec{^3 {\rm He}} \to e' + h+X$, with $h$ a detected fast hadron, is studied beyond the plane wave impulse approximation.
• To this end, a distorted spin-dependent spectral function of a nucleon inside an A=3 nucleus is actually evaluated through a generalized eikonal approximation, in order to take into account the final state interactions between the hadronizing system and the (A-1) nucleon spectator one.
• Our realistic description of both nuclear target and final state is a substantial step forward for achieving a reliable extraction of the Sivers and Collins single spin asymmetries of the free neutron.