Very heavy dark Skyrmions

Dick, Rainer (Department of Physics and Engineering Physics, University of Saskatchewan, 0000 0001 2154 235X, 116 Science Place, S7N 5E2, Saskatoon, SK, Canada)

07 December 2017

Abstract: A dark sector with a solitonic component provides a means to circumvent the problem of generically low annihilation cross sections of very heavy dark matter particles. At the same time, enhanced annihilation cross sections are necessary for indirect detection of very heavy dark matter components beyond 100 TeV. Non-thermally produced dark matter in this mass range could therefore contribute to the cosmic γ -ray and neutrino flux above 100 TeV, and massive Skyrmions provide an interesting framework for the discussion of these scenarios. Therefore a Higgs portal and a neutrino portal for very heavy Skyrmion dark matter are discussed. The Higgs portal model demonstrates a dark mediator bottleneck, where limitations on particle annihilation cross sections will prevent a signal from the potentially large soliton annihilation cross sections. This problem can be avoided in models where the dark mediator decays. This is illustrated by the neutrino portal for Skyrmion dark matter.

Published in: EPJC 77 (2017) 841
Published by: Springer/Società Italiana di Fisica
DOI: 10.1140/epjc/s10052-017-5415-3
License: CC-BY-3.0

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