B(B)over-bar angular correlations at the LHC in the parton Reggeization approach merged with higher-order matrix elements

We calculate the angular distribution spectra between beauty (B) and antibeauty ((B) over bar) mesons in proton-proton collisions in the leading order approximation of the parton Reggeization approach consistently merged with the next-to-leading order corrections from the emission of an additional hard gluon. To describe b-quark hadronization we use the universal scale-dependent parton-to-meson fragmentation functions extracted from the world e(+)e(-) annihilation data. We have obtained good agreement between our predictions and data from the CMS Collaboration at the energy root S = 7 TeV for B (B) over bar angular correlations within uncertainties and without free parameters. Predictions for analogous correlationo bservables at ffiffiffi root S = 13 TeV are provided.