Eur. Phys. J. C (2018) 78: 104
https://doi.org/10.1140/epjc/s10052-018-5552-3

Regular Article - Theoretical Physics

Little composite dark matter

¹ First Physik-Department, Technische Universität München, 85748, Garching, Germany
² Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001, Israel

^* e-mail: reuven.balkin@tum.de

Received: 17 September 2017
Accepted: 15 January 2018
Published online: 5 February 2018

Abstract

We examine the dark matter phenomenology of a composite electroweak singlet state. This singlet belongs to the Goldstone sector of a well-motivated extension of the Littlest Higgs with T-parity. A viable parameter space, consistent with the observed dark matter relic abundance as well as with the various collider, electroweak precision and dark matter direct detection experimental constraints is found for this scenario. T-parity implies a rich LHC phenomenology, which forms an interesting interplay between conventional natural SUSY type of signals involving third generation quarks and missing energy, from stop-like particle production and decay, and composite Higgs type of signals involving third generation quarks associated with Higgs and electroweak gauge boson, from vector-like top-partners production and decay. The composite features of the dark matter phenomenology allows the composite singlet to produce the correct relic abundance while interacting weakly with the Higgs via the usual Higgs portal coupling , thus evading direct detection.