QCD Corrections to Scalar Diquark Production at Hadron Colliders

TL;DR

This paper computes next-to-leading order QCD corrections for scalar diquark production at hadron colliders, providing improved cross-section estimates and transverse-momentum spectra relevant for LHC and Tevatron experiments.

Contribution

It presents the first detailed NLO QCD correction calculations for scalar diquark production, including soft gluon resummation for transverse-momentum distributions.

Findings

K-factors range from 1.22 to 1.35 for different diquark types.

Enhanced production cross sections at the LHC due to NLO corrections.

Transverse-momentum spectra computed with soft gluon resummation.

Abstract

We calculate the next-to-leading order QCD corrections to quark-quark annihilation to a scalar resonant state ("diquark") in a color representation of antitriplet or sextet at the Tevatron and LHC energies. At the LHC, we find the enhancement (K-factor) for the antitriplet diquark is typically about 1.31--1.35, and for the sextet diquark is about 1.22--1.32 for initial-state valence quarks. The full transverse-momentum spectrum for the diquarks is also calculated at the LHC by performing the soft gluon resummation to the leading logarithm and all orders in the strong coupling.