Neutral Higgs Sector of the MSSM without $R_p$

TL;DR

This paper investigates how R-parity violation in the MSSM affects the neutral Higgs sector, especially the Higgs mass and decay properties, considering one-loop corrections and large soft sector masses.

Contribution

It provides a basis-independent analysis of the neutral scalar sector in a one-generation MSSM without R-parity, including one-loop effects and soft mass impacts.

Findings

Lower experimental bounds on the lightest Higgs mass compared to MSSM.

R-parity violation leads to Higgs-slepton mixing.

Branching ratios of Higgs decays are affected by R-parity violation.

Abstract

We analyse the neutral scalar sector of the MSSM without R-parity. Our analysis is performed for a one-generation model in terms of ``basis-independent'' parameters, and includes one-loop corrections due to large yukawa couplings. We concentrate on the consequences of large $R_p$ violating masses in the soft sector, which mix the Higgses with the sleptons, because these are only constrained by their one-loop contributions to neutrino masses. We focus on the effect of $R_p$-violation on the Higgs mass and branching ratios. We find that the experimental lower bound on the lightest CP-even Higgs in this model can be lower than in the MSSM.