Darkening the Little Higgs
Travis A. W. Martin, Alejandro de la Puente

TL;DR
This paper introduces a new method to incorporate dark matter into little Higgs models without T-parity, reducing precision constraints and leveraging inert doublet phenomenology, demonstrated on the littlest Higgs model.
Contribution
A novel approach for integrating dark matter into little Higgs models applicable to many existing models without T-parity, and its application to develop the next to littlest Higgs model.
Findings
The low energy scalar potential resembles inert doublet models.
Application to the littlest Higgs model yields a viable dark matter candidate.
The model's relic density contribution is analyzed.
Abstract
We present a novel new method for incorporating dark matter into little Higgs models in a way that can be applied to many existing models without introducing T-parity, while simultaneously alleviating precision constraints arising from heavy gauge bosons. The low energy scalar potential of these dark little Higgs models is similar to, and can draw upon existing phenomenological studies of, inert doublet models. Furthermore, we apply this method to modify the littlest Higgs model to create the next to littlest Higgs model, and describe details of the dark matter candidate and its contribution to the relic density.
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