  We study the azimuthal asymmetries for quark pair production in
proton-nucleus collisions using a hybrid approach in which the nucleus is
treated in the Color Glass Condensate (CGC) framework while the Lipatov
approximation is applied on the proton side. Our treatment goes beyond the
large N_c limit. We particularly focus on the so-called correlation limit where
the imbalance of the transverse momentum of the quark pair is much smaller than
the out-going individual quark transverse momenta. In this kinematic region, a
matching between the hybrid approach and a factorization in terms of transverse
momentum dependent parton distributions(TMDs) has been found. It is shown which
of the various unpolarized and linearly polarized gluon TMD distributions
contribute to $\cos 2 \phi$ and $\cos 4 \phi$ modulations of quark pair
production.

High Energy Physics - Phenomenology