Mini Little Higgs and Dark Matter

TL;DR

This paper introduces a minimal little Higgs model with an extra U(1) gauge symmetry that naturally protects the Higgs mass and provides a stable dark matter candidate, enhancing the understanding of beyond Standard Model physics.

Contribution

It presents a novel minimal little Higgs model with an additional U(1) symmetry that stabilizes the Higgs mass and predicts a dark matter candidate.

Findings

Higgs mass protected up to 5-10 TeV scales

Extra U(1) gauge boson is stable and dark matter candidate

Model offers promising prospects for direct detection

Abstract

We construct a little Higgs model with the most minimal extension of the standard model gauge group by an extra U(1) gauge symmetry. For specific charge assignments of scalars, an approximate U(3) global symmetry appears in the cutoff-squared scalar mass terms generated from gauge bosons at one-loop level. Hence, the Higgs boson, identified as a pseudo-Goldstone boson of the broken global symmetry, has its mass radiatively protected up to scales of 5-10 TeV. In this model, a Z2 symmetry, ensuring the two U(1) gauge groups to be identical, also makes the extra massive neutral gauge boson stable and a viable dark matter candidate with a promising prospect of direct detection.