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We study angular correlations in associated hadroproduction of $\Upsilon(1S)$with the $D^{\pm}$ and $D^0$-mesons at the LHC in the Leading Order of theparton Reggeization approach. Hadronization of $b\bar{b}$-pair to$\Upsilon(1S)$ is described within the NRQCD-factorization framework.Production of $D-$mesons is described in the fragmentation model withscale-dependent fragmentaion functions. We have found good agreement with LHCbdata for various differential distributions, except for the case of spectra onazimuthal angle differences at the small $\triangle\varphi$ values. The totalcross-section in our Single Parton Scattering model, calculated underconservative assumptions, accounts for almost one half of observedcross-section, thus dramatically shrinking the room for Double PartonScattering mechanism.

Correlation observables in $\Upsilon D$ pair production at the LHC within the parton Reggeization approach