NLO QCD corrections to pseudoscalar Higgs production in the MSSM

TL;DR

This paper calculates two-loop quantum chromodynamics corrections to pseudoscalar Higgs boson production in the MSSM, providing explicit formulas for improved theoretical predictions relevant for collider experiments.

Contribution

It introduces a compact analytic method for two-loop corrections in the MSSM, expanding in heavy particle masses, applicable when the Higgs is lighter than squarks and gluinos.

Findings

Derived explicit two-loop correction formulas

Valid for Higgs lighter than squarks and gluinos

Facilitates accurate cross section computations

Abstract

We present a calculation of the two-loop quark-squark-gluino contributions to pseudoscalar Higgs boson production via gluon fusion in the MSSM. We regularize the loop integrals using the Pauli-Villars method, and obtain explicit and compact analytic results based on an expansion in the heavy particle masses. Our results - valid when the pseudoscalar Higgs boson is lighter than squarks and gluinos - can be easily implemented in computer codes for an efficient and accurate determination of the pseudoscalar production cross section.