Investigation of beauty production and parton shower effects at LHC

TL;DR

This paper compares theoretical predictions of beauty quark and jet production at the LHC with experimental data, highlighting the importance of initial gluon transverse momenta and parton shower effects.

Contribution

It introduces a comprehensive analysis using the kt-factorization approach with unintegrated gluon densities and compares predictions with LHC data, emphasizing the role of initial gluon transverse momenta.

Findings

Predictions agree with CMS and LHCb data at 7 TeV.

Initial gluon transverse momenta significantly affect data description.

Parton shower effects influence the theoretical uncertainties.

Abstract

We present hadron-level predictions from the Monte Carlo generator Cascade and parton level calculations of open b quark, b-flavored hadron and inclusive b-jet production in the framework of the kt-factorization QCD approach for the LHC energies. The unintegrated gluon densities in a proton are determined using the CCFM evolution equation and the Kimber-Martin-Ryskin (KMR) prescription. Our predictions are compared with the first data taken by the CMS and LHCb collaborations at 7 TeV. We study the theoretical uncertainties of our calculations and investigate the effects coming from parton showers in initial and final states. The special role of initial gluon transverse momenta in description of the data is pointed out.