Unusual Higgs boson signal in R-parity violating nonminimal supersymmetric models at the LHC

TL;DR

This paper proposes a unique, background-free Higgs boson signal in R-parity violating nonminimal supersymmetric models at the LHC, characterized by displaced vertices and dileptons, enabling potential Higgs discovery and seesaw scale estimation.

Contribution

It introduces a novel Higgs signal signature involving displaced vertices in R-parity violating supersymmetry, with analysis for different Higgs mass scenarios at the LHC.

Findings

Signal can be used for Higgs discovery at 14 TeV with 5 fb$^{-1}$

Even at 7 TeV, a significant number of events are expected

Mass reconstruction of gauge-singlet LSP can estimate the seesaw scale

Abstract

We predict an unconventional background free signal of the Higgs boson in $R$-parity violating nonminimal supersymmetric models at the Large Hadron Collider (LHC). The signal comprises dilepton plus four hadronic jets and two large displaced vertices. The displaced leptons and jets are coming from the decay of the lightest supersymmetric particle (LSP), which is predominantly a gauge-singlet neutrino. A pair of such LSPs can couple to a Higgs boson, created via gluon fusion. We have analyzed two cases - one corresponding to the tree-level Higgs boson mass and another with the one-loop corrected mass of the Higgs boson. A reliable Higgs mass reconstruction using this signal can lead to discovery at the LHC with center-of-mass energy $\sqrt{s}=14~\rm{TeV}$ and 5 fb$^{-1}$ of integrated luminosity $(\mathcal{L})$. Even at $\sqrt{s}=7~\rm{TeV}$ and $\mathcal{L}$ = 5 fb$^{-1}$, a reasonable number of events are expected. Besides, mass reconstruction of a gauge-singlet LSP can provide an estimate of the seesaw scale.