Is the 125 GeV Higgs the superpartner of a neutrino?

TL;DR

This paper explores the possibility that the 125 GeV Higgs boson could be the superpartner of a neutrino within a supersymmetric model featuring an approximate R-symmetry acting as lepton number, predicting unique decay signatures.

Contribution

It introduces a supersymmetric model linking the Higgs to a neutrino via R-symmetry, predicting distinctive Higgs decays and superpartner phenomenology at the LHC.

Findings

Higgs has an invisible decay mode into Goldstino and neutrino with up to 10% branching ratio.

Stops and sbottoms are predicted to be lighter than 1 TeV with unique decay channels.

Model's phenomenology differs from the MSSM, offering new experimental signatures.

Abstract

Recent LHC searches have provided strong evidence for the Higgs, a boson whose gauge quantum numbers coincide with those of a SM fermion, the neutrino. This raises the mandatory question of whether Higgs and neutrino can be related by supersymmetry. We study this possibility in a model in which an approximate R-symmetry acts as a lepton number. We show that Higgs physics resembles that of the SM-Higgs with the exception of a novel invisible decay into Goldstino and neutrino with a branching fraction that can be as large as ~10%. Based on naturalness criteria, only stops and sbottoms are required to be lighter than the TeV with a phenomenology dictated by the R-symmetry. They have novel decays into quarks+leptons that could be seen at the LHC, allowing to distinguish these scenarios from the ordinary MSSM.