10-17 July 2019
Ghent
Europe/Brussels timezone

Phase transitions and gravitational waves in models of Z_N scalar dark matter

11 Jul 2019, 15:50
20m
Campus Ledeganck - Aud. 2 (Ghent)

Campus Ledeganck - Aud. 2

Ghent

Parallel talk Dark Matter Dark Matter

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)

Presentation Materials