Supersymmetric Axion-Neutrino Model with a Higgs Hybrid

TL;DR

This paper proposes a supersymmetric axion-neutrino model featuring a Higgs-saxion hybrid, enabling potential detection at the LHC and offering new insights into axion and neutrino mass mechanisms.

Contribution

It introduces a variation of the supersymmetric axion-neutrino model with Higgs mixing, making the Higgs hybrid observable at the LHC, unlike previous models.

Findings

Higgs-saxion mixing can be significant for collider detection

Production of Higgs hybrid can be tuned via exotic color superfields

Model provides a testable link between axion physics and neutrino masses

Abstract

In 2001, a supersymmetric model was proposed to relate the axion scale to that of neutrino mass seesaw. Whereas this scenario is realistic, the particles associated with this mechanism are either too heavy or too weakly coupled for them to be observed (other than the axion itself or perhaps the axino). A variation of that model is here proposed which allows significant mixing of the Higgs boson with a new singlet related to the saxion (the scalar partner of the pseudoscalar axion), rendering it possible to be observed at the Large Hadron Collider (LHC). With the addition of exotic color superfields, this also becomes a specific realization of how the production of such a Higgs hybrid may be suppressed or enhanced at the LHC, which is very relevant to ongoing experimental efforts to find the Higgs boson.