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The Little Skyrmion: New Dark Matter for Little Higgs Models
journal contributionposted on 2012-04-29, 00:00 authored by Marc Gillioz, Andreas von Manteuffel, Pedro Schwaller, Daniel Wyler
We study skyrmions in the littlest Higgs model and discuss their possible role as dark matter candidates. Stable massive skyrmions can exist in the littlest Higgs model also in absence of an exact parity symmetry, since they carry a conserved topological charge due to the non-trivial third homotopy group of the SU(5)/SO(5) coset. We find a spherically symmetric skyrmion solution in this coset. The effects of gauge fields on the skyrmion solutions are analyzed and found to lead to an upper bound on the skyrmion mass. The relic abundance is in agreement with the observed dark matter density for reasonable parameter choices.
This work was supported in part by the Schweizer Nationalfonds and by the U.S. Department of Energy, Division of High Energy Physics, under Contract DE-AC02- 06CH11357 and DE-FG02-84ER40173.
Publisher StatementPost print version of article may differ from published version. The original publication is available at www.springerlink.com DOI: 10.1007/JHEP03(2011)048