Origin of the Large Perturbative Corrections to Higgs Production at Hadron Colliders

TL;DR

This paper explains the origin of large perturbative corrections in Higgs production at hadron colliders, showing they stem from specific enhanced terms that can be resummed, leading to a more accurate prediction of the K-factor.

Contribution

It identifies the source of large corrections as analytic continuation effects and demonstrates their resummation, refining Higgs production predictions at the LHC.

Findings

Resummation reduces the Higgs production K-factor to about 1.3.

Enhanced corrections originate from (C_Aπα_s)^n terms in the gluon form factor.

Resummation improves the perturbative convergence for Higgs production cross sections.

Abstract

The very large K-factor for Higgs-boson production at hadron colliders is shown to result from enhanced perturbative corrections of the form (C_A\pi\alpha_s)^n, which arise in the analytic continuation of the gluon form factor to time-like momentum transfer. These terms are resummed to all orders in perturbation theory using the renormalization group. After the resummation, the K-factor for the production of a light Higgs boson at the LHC is reduced to a value close to 1.3.