scholarly journals On gauge dependence of gravitational waves from a first-order phase transition in classical scale-invariant U (1) ′ models

2017 ◽  
Vol 774 ◽  
pp. 489-493 ◽  
Author(s):  
Cheng-Wei Chiang ◽  
Eibun Senaha
Keyword(s):  
Phase Transition ◽  
Gravitational Waves ◽  
Order Phase Transition ◽  
Scale Invariant ◽  
First Order ◽  
Gauge Dependence ◽  
First Order Phase Transition ◽  
First Order Phase

scholarly journals Gravitational wave signals of dark matter freeze-out

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Danny Marfatia ◽  
Po-Yan Tseng
Keyword(s):  
Phase Transition ◽  
Dark Matter ◽  
Gravitational Waves ◽  
Order Phase Transition ◽  
First Order ◽  
Stochastic Background ◽  
First Order Phase Transition ◽  
Relic Abundance ◽  
First Order Phase ◽  
Freeze Out

Abstract We study the stochastic background of gravitational waves which accompany the sudden freeze-out of dark matter triggered by a cosmological first order phase transition that endows dark matter with mass. We consider models that produce the measured dark matter relic abundance via (1) bubble filtering, and (2) inflation and reheating, and show that gravitational waves from these mechanisms are detectable at future interferometers.

GRAVITATIONAL WAVES FROM COSMOLOGICAL PHASE TRANSITIONS

2009 ◽  
Vol 24 (08n09) ◽  
pp. 1541-1544
Author(s):  
ARIEL MÉGEVAND
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Gravitational Waves ◽  
Order Phase Transition ◽  
Gravitational Radiation ◽  
First Order ◽  
First Order Phase Transition ◽  
First Order Phase

I discuss the gravitational radiation produced in a first-order phase transition due to the turbulence that is caused by bubble expansion. I compare the cases of deflagration and detonation bubbles.

scholarly journals Filtered asymmetric dark matter during the Peccei-Quinn phase transition

2021 ◽  
Vol 2021 (10) ◽  
Author(s):  
M. Ahmadvand
Keyword(s):  
Phase Transition ◽  
Dark Matter ◽  
Gravitational Waves ◽  
Order Phase Transition ◽  
Annihilation Process ◽  
Density Spectrum ◽  
First Order ◽  
First Order Phase Transition ◽  
Asymmetric Dark Matter ◽  
First Order Phase

Abstract In this paper, we propose a bubble filtering-out mechanism for an asymmetric dark matter scenario during the Peccei-Quinn (PQ) phase transition. Based on a QCD axion model, extended by extra chiral neutrinos, we show that the PQ phase transition can be first order in the parameter space of the model and regarding the PQ symmetry breaking scale, the mechanism can generate PeV-scale heavy neutrinos as a dark matter candidate. Considering a CP-violating source, during the phase transition, discriminating between the neutrino and antineutrino number density, we find the observed dark matter relic abundance, such that the setup can be applied to the first order phase transition with different strengths. We then calculate effective couplings of the QCD axion addressing the strong CP problem within the model. We also study the energy density spectrum of gravitational waves generated from the first order phase transition and show that the signals can be detected by future ground-based detectors such as Einstein Telescope. In particular, for a visible heavy axion case of the model, it is shown that gravitational waves can be probed by DECIGO and BBO interferometers. Furthermore, we discuss the dark matter-standard model neutrino annihilation process as a source for the creation of PeV-scale neutrinos.

scholarly journals Gravitational Waves from the Sound of a First Order Phase Transition

2014 ◽  
Vol 112 (4) ◽  
Author(s):  
Mark Hindmarsh ◽  
Stephan J. Huber ◽  
Kari Rummukainen ◽  
David J. Weir
Keyword(s):  
Phase Transition ◽  
Gravitational Waves ◽  
Order Phase Transition ◽  
First Order ◽  
First Order Phase Transition ◽  
First Order Phase

scholarly journals Identifying a First-Order Phase Transition in Neutron-Star Mergers through Gravitational Waves

2019 ◽  
Vol 122 (6) ◽  
Author(s):  
Andreas Bauswein ◽  
Niels-Uwe F. Bastian ◽  
David B. Blaschke ◽  
Katerina Chatziioannou ◽  
James A. Clark ◽  
...  
Keyword(s):  
Phase Transition ◽  
Neutron Star ◽  
Gravitational Waves ◽  
Order Phase Transition ◽  
First Order ◽  
First Order Phase Transition ◽  
First Order Phase
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