Gravitational Wave Bursts as Harbingers of Cosmic Strings Diluted by Inflation
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79 ASTRONOMY AND ASTROPHYSICS↗
Engineering topics
Morrissey, David E.
Publications and source records attributed to Morrissey, David E..
Probing the pre-BBN universe with gravitational waves from cosmic strings
Many motivated extensions of the Standard Model predict the existence of cosmic strings. Gravitational waves originating from the dynamics of the resulting cosmic string network have the ability to probe many otherwise inaccessible properties of the early universe. In this study we show how the spectrum of gravitational waves from a cosmic string network can be used to test the equation of state of the early universe prior to Big Bang Nucleosynthesis (BBN). We also demonstrate that current and planned gravitational wave detectors such as LIGO, LISA, DECIGO/BBO, and ET/CE have the potential to detect signals of a non-standard pre-BBN equation of state and evolution of the early universe (e.g., early non-standard matter domination or kination domination) or new degrees of freedom active in the early universe beyond the sensitivity of terrestrial collider experiments and cosmic microwave background measurements.
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗
Cosmic archaeology with gravitational waves from cosmic strings
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79 ASTRONOMY AND ASTROPHYSICS↗
Compressing the Inert Doublet Model
The Inert Doublet Model relies on a discrete symmetry to prevent couplings of the new scalars to Standard Model fermions. We found that this stabilizes the lightest inert state, which can then contribute to the observed dark matter density. In the presence of additional approximate symmetries, the resulting spectrum of exotic scalars can be compressed. Here, we study the phenomenological and cosmological implications of this scenario. In conclusion, we derive new limits on the compressed Inert Doublet Model from LEP, and outline the prospects for exclusion and discovery of this model at dark matter experiments, the LHC, and future colliders.
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗