Light Higgs Mass Bound in SUSY Left-Right Models

TL;DR

This paper demonstrates that supersymmetric left-right models allow for a higher upper bound on the lightest Higgs mass compared to the MSSM, depending on the parity restoration scale, with implications for neutrino mass mechanisms.

Contribution

It provides a calculation showing the Higgs mass bound in SUSYLR models can exceed MSSM bounds by 10-20 GeV, linking Higgs measurements to neutrino mass scales.

Findings

Higgs mass bound can be 10-20 GeV higher than MSSM

Bound depends on parity restoration scale

Measurement of Higgs mass can probe low seesaw scale

Abstract

We show that in supersymmetric left-right models (SUSYLR), the upper bound on the lightest neutral Higgs mass can be appreciably higher than that in minimal supersymmetric standard model (MSSM). The exact magnitude of the bound depends on the scale of parity restoration and can be 10-20 GeV above the MSSM bound if mass of the right-handed gauge boson $W_R$ is in the TeV range. An important implication of our result is that since SUSYLR models provide a simple realization of seesaw mechanism for neutrino masses, measurement of the Higgs boson mass could provide an independent probe of a low seesaw scale.