Transversity studies with a polarized 3He target

A realistic study of the SiDIS process He(e, e π)X in the Bjorken limit is briefly reviewed, showing that the nuclear effects, present in the extraction of the neutron information, are largely under theoretical control, within an Impulse- Approximation approach. In view of the forthcoming experimental data, we shortly present a novel Poincar ́e covariant description of the nuclear target, implementing a Light-Front analysis at finite Q2, within the Bakamijan-Thomas construction of the Poincar ́e generators. Furthermore, as a by-product of the introduction of a Light- Front spin-dependent spectral function for a J = 1/2 system, we straightforwardly extend our analysis to the quark-quark correlator, obtaining three new exact rela- tions between the six leading-twist Transverse-Momentum–Dependent distributions.