Gluon-fusion contributions to Phi + 2 Jet production

TL;DR

This paper calculates the gluon fusion production of a pseudoscalar Higgs boson with two jets, including full quark mass effects and interference effects, advancing precision in Higgs production modeling.

Contribution

It provides the first detailed calculation of double real emission corrections for pseudoscalar Higgs production with full quark mass effects and interference considerations.

Findings

Includes full quark mass effects in the amplitudes.

Accounts for interference between top and bottom quark loops.

Extends previous results for CP-even Higgs to CP-odd case.

Abstract

In high energy hadronic collisions a scalar or pseudoscalar Higgs boson, Phi=H,A, can be efficiently produced via gluon fusion, which is mediated by heavy quark loops. We here consider double real emission corrections to Phi=A production, which lead to a Higgs plus two-jet final state, at order alpha_s^4. Full quark mass effects are considered in the calculation of scattering amplitudes for the CP-odd Higgs boson A, as induced by quark triangle-, box- and pentagon-diagrams. They complement the analogous results for a CP-even Higgs boson H in Ref.[1]. Interference effects between loops with top and bottom quarks as well as between CP-even and CP-odd couplings of the heavy quarks are fully taken into account.