Scalar Particle Contribution to Higgs Production via Gluon Fusion at NLO

TL;DR

This paper provides analytic NLO QCD corrections for scalar Higgs production via gluon fusion in models with additional colored particles, enabling precise predictions across various theories.

Contribution

It offers general formulas for NLO corrections in extended models, including scalar and fermion contributions, applicable to different theoretical frameworks.

Findings

Analytic expressions for $gg\to Hg$, $q\bar{q}\to Hg$, and $qg\to Hq$ processes.

Application to models with scalar doublets in adjoint representation and MSSM.

Enhanced precision in Higgs production cross section calculations.

Abstract

We consider the gluon fusion production cross section of a scalar Higgs boson in models where fermion and scalar massive colored particles are present. We report analytic expressions for the matrix elements of $gg\to Hg$, $q\bar{q}\to Hg$, and $qg\to Hq$ processes completing the calculation of the NLO QCD corrections in these extended scenarios. The formulas are written in a complete general case, allowing a flexible use for different theoretical models. Applications of our results to two different models are presented: i) a model in which the SM Higgs sector is augmented by a weak doublet scalar in the $SU(N_c)$ adjoint representation. ii) The MSSM, in the limit of neglecting the gluino contribution to the cross section.