Phenomenology of kt-factorization for inclusive top quark pair production at hadron colliders

TL;DR

This paper explores top quark pair production at high energies using kt-factorization QCD, incorporating off-shell partonic processes and unintegrated parton densities, and compares predictions with experimental data.

Contribution

It provides a phenomenological analysis of top quark pair production using kt-factorization with unintegrated PDFs and compares results to NLO pQCD and experimental data.

Findings

Predictions agree well with experimental data from Tevatron and LHC.

Inclusion of transverse momentum effects improves theoretical accuracy.

Comparison with NLO pQCD shows consistent results.

Abstract

We investigate the inclusive top quark pair production in proton-proton and proton-antiproton collisions at high energies in the framework of kt-factorization QCD approach. Our study is based on the off-shell partonic subprocesses g*g* -> QQ and q*q* -> QQ, where the transverse momentum of both incoming quarks and gluons are taken into account. The unintegrated parton densities in a proton are determined by the Kimber-Martin-Ryskin prescription as well as the CCFM evolution equation. The conservative error analisys is performed and comparison with the results of traditional NLO pQCD calculations is done. Our predictions agree well with the recent experimental data taken by the D0, CDF, CMS and ATLAS collaborations at the Tevatron and LHC energies.