B B angular correlations at the LHC in parton Reggeization approach merged with higher-order matrix elements
Abstract
We calculate the angular distribution spectra between beauty (B) and anti-beauty ( B) 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 additional hard gluon. To describe b-quark hadronization we use the universal scale-depended 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 S=7 TeV for B B angular correlations within uncertainties and without free parameters. Predictions for analogous correlation observables at S=13 TeV are provided.
0