Higgs boson signals in lambda-SUSY with a Scale Invariant Superpotential

TL;DR

This paper explores the lambda-SUSY model with a scale-invariant superpotential, showing how the Higgs boson can naturally reach about 200 GeV and analyzing its detection prospects at the LHC.

Contribution

It provides a detailed analysis of the parameter space and phenomenology of lambda-SUSY with a scale-invariant superpotential, highlighting its impact on Higgs signals.

Findings

Higgs mass can be raised to about 200 GeV at tree level.

Production rate and decay into gauge bosons can be suppressed.

Higgs detection at LHC may be challenging due to reduced signals.

Abstract

We reconsider the lambda-SUSY model, in which the mass of the Higgs boson is raised already at tree level up to about 200 GeV via an additional interaction in the superpotential between the Higgs bosons and a Singlet, focusing on a scale invariant superpotential. After a detailed analysis of the allowed region in parameter space, which includes constraints coming from the absence of spontaneous CP violation and of unrealistic minima, we study the scalar mass spectrum, the production rate and the decay modes of the lightest scalar, finding that in general both the production rate and the Branching Ratio into gauge bosons can be reduced with respect of those of the standard Higgs, causing it to be hardly detected in the first run of the LHC.