We study angular correlations in associated hadroproduction of Υ(1S) with the D± and D0-mesons at the LHC in the Leading Order of the parton Reggeization approach. Hadronization of bbˉ-pair to Υ(1S) is described within the NRQCD-factorization framework. Production of D−mesons is described in the fragmentation model with scale-dependent fragmentaion functions. We have found good agreement with LHCb data for various differential distributions, except for the case of spectra on azimuthal angle differences at the small △φ values. The total cross-section in our Single Parton Scattering model, calculated under conservative assumptions, accounts for almost one half of observed cross-section, thus dramatically shrinking the room for Double Parton Scattering mechanism.
@article{arxiv.1811.06733,
title = {Correlation observables in $\Upsilon D$ pair production at the LHC within the parton Reggeization approach},
author = {Anton Karpishkov and Maxim Nefedov and Vladimir Saleev},
journal= {arXiv preprint arXiv:1811.06733},
year = {2019}
}