PeV Scale Dark Skyrmions
Berezowski, Madeline R
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The background information relevant to understanding skyrmions and dark matter is first reviewed. PeV scale skyrmions as a coherent state of dark heavy mesons with an Anderson-Higgs portal coupling to the Standard Model are analyzed as dark matter. Their creation would have been non-thermal via a chiral phase transition in the early universe. It turns out that it does not matter whether the transition is First Order or Second Order. Constraints are put on the skyrmion parameter g_V^2M_S, where g_V is the Skyrme coupling and M_S is the skyrmion mass, which indicate that it is possible for the skyrmions to be PeV scale and for g_V ≲ 1. For the dark mesons to not contribute significantly to dark matter they must be TeV scale if g_wh, their coupling to the Anderson-Higgs field, is to be perturbative. Considering the dark skyrmions as coherent states of the dark mesons gives an expression for the skyrmion-nucleon scattering cross section in terms of g_V, g_wh, and M_S. Direct dark matter detection experiment results are used to constrain g_V in terms of g_wh for 100TeV ≲ M_S ≲ 10PeV. It is possible for g_V to be of perturbative strength, especially for skyrmion masses closer to 10PeV. Future direct detection experiments will yield even more stringent constraints .
DegreeMaster of Science (M.Sc.)
DepartmentPhysics and Engineering Physics
CommitteeGreen, Robert; Tanaka, Kaori; Ghezelbash, Masoud; Rayan, Steven
Copyright DateJune 2020