Predicted Higgs-related spin 1/2 particles as a new dark matter candidate

TL;DR

This paper proposes a new dark matter candidate consisting of predicted spin 1/2 particles related to the Higgs boson, which could be detected in collider experiments and produce distinctive signatures.

Contribution

It introduces a novel class of spin 1/2 particles predicted by a specific theory, linking them to the Higgs boson and suggesting their potential as dark matter candidates.

Findings

Particles have mass comparable to Higgs boson (~125 GeV)

Detectable signatures include photons, positrons, and electrons at 125 GeV

Particles are stable and do not decay through standard mechanisms

Abstract

The theory at arXiv:1101.0586 [hep-th] predicts new fundamental spin $1/2$ particles which can be produced in pairs through their couplings to vector bosons or fermions. The lowest-energy of these should have a mass $m_{1/2}$ comparable to the mass $m_h$ of the recently discovered Higgs boson, with $m_{1/2} = m_h$ in the simplest model. These particles should therefore be detectable in collider experiments, perhaps in Run 2 or 3 of the LHC. They cannot decay through any obvious mechanisms in standard physics, making them a new dark matter candidate. In the simplest model, annihilations would produce a well-defined signature with photons, positrons, and excess electrons at about 125 GeV, and the mass would also be well-defined for direct dark matter detection.