Improved resummation prediction on Higgs boson production at hadron colliders

TL;DR

This paper enhances the ResBos program for Higgs boson production predictions at hadron colliders by incorporating NNLO corrections, resulting in more accurate cross section and distribution estimates, and compares these with other existing programs.

Contribution

The paper introduces ResBos2, an improved resummation prediction tool for Higgs production that includes NNLO effects, providing more precise cross section and distribution calculations.

Findings

ResBos2 increases total cross section predictions by 8% at Tevatron and 6% at LHC.

ResBos2 predictions agree well with HNNLO and HqT2 for total cross sections.

Distributions of $a_T$ and $\,phi^{*}$ are presented with better experimental resolution.

Abstract

We improve the resummation calculations in the ResBos program for the Higgs boson production via gluon-gluon fusion by including the NNLO Wilson coefficient functions and G-functions. The improvement leads to increasing the total cross section predictions of the new ResBos program, dubbed as ResBos2, for Higgs boson production by about 8% and 6% at the Tevatron and the LHC, respectively, as compared to the old ResBos program. Furthermore, the improved predictions are compared with those from the programs HNNLO and HqT2. We find that they agree well for the total cross sections but differ slightly for the transverse momentum $Q_T$ distributions. With ResBos2, we present the distributions of the two variables $a_T$ and $\phi^{*}$, which can have better experimental resolutions than $Q_T$, for the process of Higgs boson decaying into a photon pair. Theoretical uncertainties of the ResBos2 predictions are also discussed.