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Dilaton Forbidden Dark Matter

Maurizio Piai Orcid Logo, James Ingoldby Orcid Logo, Thomas Appelquist Orcid Logo

Phys Rev D

Swansea University Author: Maurizio Piai Orcid Logo

Abstract

Dilaton effective field theory (dEFT) describes the long distance behavior of certain confining, near-conformal gauge theories that have been studied via lattice computation. Pseudo-Nambu-Goldstone bosons (pNGBs), emerging from the breaking of approximate, continuous, internal symmetries, are couple...

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Published in: Phys Rev D
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URI: https://cronfa.swan.ac.uk/Record/cronfa66974
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Abstract: Dilaton effective field theory (dEFT) describes the long distance behavior of certain confining, near-conformal gauge theories that have been studied via lattice computation. Pseudo-Nambu-Goldstone bosons (pNGBs), emerging from the breaking of approximate, continuous, internal symmetries, are coupled to an additional scalar particle, the dilaton, arising from the spontaneous breaking of approximate scale invariance. This effective theory has been employed to study possible extensions of the standard model. In this paper, we propose a complementary role for dEFT, as a description of the dark matter of the universe, with the pNGBs identified as the dark-matter particles. We show that this theory provides a natural implementation of the “forbidden” dark matter mechanism, and we identify regions of parameter space for which the thermal history of dEFT yields the measured dark matter relic density.
College: Faculty of Science and Engineering