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Related Experiment Video

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The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

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Gravitational Waves from a Dark Phase Transition.

Pedro Schwaller¹

¹CERN, Theory Division, CH-1211 Geneva 23, Switzerland.

Physical Review Letters

|November 14, 2015

Summary

This summary is machine-generated.

A strong first-order phase transition in composite dark sectors could generate detectable gravitational waves. This cosmic event offers a unique probe for dark sector interactions, potentially observable with future experiments.

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Area of Science:

Cosmology
Particle Physics
Astrophysics

Background:

Composite dark sectors are proposed extensions to the Standard Model.
First-order phase transitions in the early Universe can leave observable relics.
Gravitational waves are a potential probe of physics beyond the Standard Model.

Purpose of the Study:

To investigate the conditions for a strong first-order phase transition in composite dark sectors.
To calculate the resulting gravitational wave spectrum.
To assess the detectability of this signal with current and future experiments.

Main Methods:

Analysis of SU(N) dark sectors with n_f flavors.
Calculation of gravitational wave spectra based on dark confinement scale.
Comparison with sensitivity curves of eLISA and pulsar timing array experiments.

Main Results:

A large class of composite dark sector models exhibits strong first-order phase transitions.
The predicted gravitational wave signals can be detectable by eLISA or pulsar timing arrays.
The gravitational wave signal offers a unique test of dark sector gravitational interactions.

Conclusions:

Composite dark sectors provide a viable framework for detectable gravitational wave signals from early Universe phase transitions.
Gravitational wave searches offer complementary information to direct and indirect detection methods for dark matter.
Specific models like Twin Higgs and Strongly Interacting Massive Particles (SIMPs) are consistent with this scenario.