  We calculate the helicity amplitudes for scattering of a quark from both
large and small $x$ gluons of a target proton or nucleus using spinor helicity
formalism. We show that scattering from large $x$ gluons of the target results
in non-zero spin asymmetry at intermediate $p_t$ as well as rapidity loss of
the projectile quark. We comment on how this can also generate angular
asymmetries in particle production in high energy collisions.

High Energy Physics - Phenomenology;Nuclear Theory