Production of massless bottom jets in ppbar and pp collisions at next-to-leading order of QCD

TL;DR

This paper predicts the production rates of massless bottom jets in proton-antiproton and proton-proton collisions at high energies using next-to-leading order QCD, showing how the cross section ratios vary with transverse momentum and aligning with experimental data.

Contribution

It provides NLO QCD predictions for massless bottom jet production and compares them with experimental results, incorporating non-perturbative corrections from PYTHIA.

Findings

K factor is less than one at small p_T and approaches one at high p_T.

Non-perturbative corrections improve agreement with experimental data.

The results depend on the choice of renormalization scale.

Abstract

We present predictions for the inclusive production of bottom jets in proton-antiproton collisions at 1.96 TeV and proton-proton collisions at 7 TeV. The bottom quark is considered massless. In this scheme, we find that at small transverse momentum (p_T) the ratio of the next-to-leading order to the leading-order cross section (K factor) is smaller than one. It increases with increasing p_T and approaches one at larger p_T at a value depending essentially on the choice of the renormalization scale. Adding non-perturbative corrections obtained from PYTHIA Monte Carlo calculations leads to reasonable agreement with experimental b-jet cross sections obtained by the CDF and the CMS collaborations.