Complete one-loop effects of SUSY QCD in $b\bar{b}h$ production at the LHC under current experimental constraints

TL;DR

This paper calculates the complete one-loop SUSY QCD corrections to Higgs production with bottom quarks at the LHC within the MSSM, considering current experimental constraints, and finds significant effects in certain parameter regions.

Contribution

It provides the first comprehensive calculation of one-loop SUSY QCD effects on $b\bar{b}h$ production under realistic experimental constraints in the MSSM.

Findings

Large SUSY QCD effects for high tanβ and low m_A, but excluded by LHC data.

Maximal SUSY QCD correction of about -9% for allowed parameter space.

Constraints from LHC Higgs and SUSY searches limit the size of SUSY effects.

Abstract

Inspired by the recent LHC Higgs data and null search results of supersymmetry (SUSY), we scan the parameter space of the Minimal Supersymmetric Standard Model (MSSM) with relatively heavy sparticles (1-3 TeV). Then in the parameter space allowed by current collider experiments and dark matter detections, we calculate the complete one-loop SUSY QCD corrections to $pp\to b\bar{b}h$ at the LHC with $\sqrt{s}=14$ TeV and obtain the following observations: (i) For the large values of $\tan\beta$ and low values of $m_{A}$, the SUSY QCD effects can be quite large, which, however, have been excluded by the latest results of LHC search for $H/A \to \tau^{+}\tau^{-}$; (ii) For modest values of $\tan\beta$ and $m_{A}$ which so far survived all experimental constraints, the SUSY QCD corrections can maximally reach about -9%.