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Gravitational Wave Signals of Pseudo-Goldstone Dark Matter in the Complex Singlet Model
Kristjan Kannike, Kaius Loos, Martti Raidal
We study pseudo-Goldstone dark matter in the complex scalar singlet model. Because the direct detection spin-independent cross section is suppressed, such dark mat…
Geometry of Flat Directions in Scale-Invariant Potentials
Kristjan Kannike, Aleksei Kubarski, Luca Marzola
We observe that biquadratic potentials admit non-trivial flat directions when the determinant of the quartic coupling matrix of the scalar fields vanishes. This consideration sugge…
Improved bounds on singlet dark matter
Andi Hektor, Andrzej Hryczuk, Kristjan Kannike
We reconsider complex scalar singlet dark matter stabilised by a symmetry. We refine the stability bounds on the potential and use constraints from unitarity on sc…
Phase Transitions and Gravitational Wave Tests of Pseudo-Goldstone Dark Matter in the Softly Broken U(1) Scalar Singlet Model
Kristjan Kannike, Martti Raidal
We study phase transitions in a softly broken complex singlet scalar model in which the dark matter is the pseudo-scalar part of a singlet whose direct detection coupling to…