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The Drell-Yan process is studied in the framework of TMD factorization in theSudakov region $s\gg Q^2\gg q_\perp^2$ corresponding to recent LHC experimentswith $Q^2$ of order of mass of Z-boson and transverse momentum of DY pair$\sim$ few tens GeV. The DY hadronic tensors are expressed in terms of quarkand quark-gluon TMDs with ${1\over Q^2}$ and ${1\over N_c^2}$ accuracy. It isdemonstrated that in the leading order in $N_c$ the higher-twistquark-quark-gluon TMDs reduce to leading-twist TMDs due to QCD equation ofmotion. The resulting hadronic tensors depend on two leading-twist TMDs: $f_1$responsible for total DY cross section, and Boer-Mulders function $h_1^\perp$.The corresponding qualitative and semi-quantitative predictions seem to agreewith LHC data on five angular coefficients $A_0-A_4$ of DY pair production. Theremaining three coefficients $A_5-A_7$ are determined by quark-quark-gluon TMDsmultiplied by extra ${1\over N_c}$ so they appear to be relatively small inaccordance with LHC results.

Drell-Yan angular lepton distributions at small $x$ from TMD factorization