Paper
$B{\bar B}$ angular correlations at the LHC in parton Reggeization approach merged with higher-order matrix elements
Authors
Anton Karpishkov, Maxim Nefedov, Vladimir Saleev
Abstract
We calculate the angular distribution spectra between beauty () and anti-beauty () 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 annihilation data. We have obtained good agreement between our predictions and data from the CMS Collaboration at the energy TeV for angular correlations within uncertainties and without free parameters. Predictions for analogous correlation observables at TeV are provided.