Heavy flavor production in high-energy $pp$ collisions: color dipole description

Abstract

We present a detailed study of open heavy flavor production in high-energy $pp$ collisions at the LHC in the color dipole framework. The transverse momentum distributions of produced $b$-jets, accounting for the jet energy loss, as well as produced open charm $D$ and bottom $B$ mesons in distinct rapidity intervals relevant for LHC measurements are computed. The dipole model results for the differential $b$-jet production cross section are compared to the recent ATLAS and CMS data while the results for $D$ and $B$ mesons production cross sections -- to the corresponding LHCb data. Several models for the phenomenological dipole cross section have been employed to estimate theoretical uncertainties of the dipole model predictions. We demonstrate that the primordial transverse momentum distribution of the projectile gluon significantly affects the meson spectra at low transverse momenta and contributes to the largest uncertainty of the dipole model predictions.

22 pages, 9 figures

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• Single diffractive production of open heavy flavor mesons
• Diffractive dijet production: breakdown of factorization
• Production of forward heavy-flavour dijets at the LHCb within $k_T$-factorization approach
• Strangeness production in high-multiplicity events
• The universal function of the diffractive process in color dipole picture
• Electroproduction of $D$- and $B$-mesons in high-multiplicity $ep$ collisions
• Coherent photoproduction of light vector mesons off nuclear targets in the dipole picture