SQCD Corrections to bg -> bh

TL;DR

This paper calculates SUSY QCD corrections to Higgs production with a b quark in the MSSM, highlighting the importance of these effects for Higgs discovery and comparing exact results with approximation methods.

Contribution

It provides the first detailed order(alpha_s) calculations of SUSY QCD effects on bg -> bh production, analyzing decoupling and comparing with the Delta_b approximation.

Findings

Exact calculations differ from the Delta_b approximation in certain regimes.

SUSY QCD effects can significantly modify Higgs production rates.

Decoupling behavior of squarks and gluinos is analyzed.

Abstract

In the Minimal Supersymmetric Standard Model, the effective b quark Yukawa coupling to the lightest neutral Higgs boson is enhanced. Therefore, the associated production of the lightest Higgs boson with a b quark is an important discovery channel. We consider the SUSY QCD contributions from squarks and gluinos and discuss the decoupling properties of these effects. A comparision of our exact Order(alpha_s) results with those of a widely used effective Lagrangian approach, the Delta_b approximation, is also presented.