Speaker
Mr
Nico Benincasa
Description
We study the nature of phase transitions and gravitational wave signals in models of scalar dark matter with Z_N symmetries. The scalar sector comprises the Standard Model Higgs, an Inert Doublet and a complex singlet. In such models, the dark matter relic density can be largely determined by semi-annihilations instead of usual annihilations, which reduces the direct detection signal. We perform a thorough study of the parameter space, investigating the impact of the quartic semi-annihilation couplings on the structure of potential minima, phase transitions, and possible enhancements of the stochastic gravitational wave signal.
Primary authors
Mr
Nico Benincasa
Kristjan Kannike
(National Institute of Chemical Physics and Biophysics (EE))
Andi Hektor
(National Institute of Chemical Physics and Biophysics (EE))
Andrzej Hryczuk
(University of Oslo)
