Single spin asymmetry in forward pA collisions
Published Web Locationhttp://dx.doi.org/10.1103/PhysRevD.94.054013
We compute the transverse single spin asymmetry in light hadron production p↑p→hX and p↑A→hX including the gluon saturation effect in the unpolarized nucleon/nucleus. In the forward (large-xF) region, the dominant contribution comes from the so-called derivative term associated with the soft gluonic pole. This leads to the cancellation of nuclear effects in AN which can be tested at the RHIC. We also show that the soft fermionic pole disappears in the saturation environment.