scholarly journals Gravitational tests of electroweak relaxation

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Daniele Barducci ◽  
Enrico Bertuzzo ◽  
Martín Arteaga Tupia
Keyword(s):  
Phase Transition ◽  
Strong Interactions ◽  
Back Reaction ◽  
Electroweak Scale ◽  
First Order ◽  
Relaxation Phase ◽  
First Order Phase Transition ◽  
Reaction Potential ◽  
First Order Phase ◽  
The Universe

Abstract We consider a scenario in which the electroweak scale is stabilized via the relaxion mechanism during inflation, focussing on the case in which the back-reaction potential is generated by the confinement of new strongly interacting vector-like fermions. If the reheating temperature is sufficiently high to cause the deconfinement of the new strong interactions, the back-reaction barrier then disappears and the Universe undergoes a second relaxation phase. This phase stops when the temperature drops sufficiently for the back-reaction to form again. We identify the regions of parameter space in which the second relaxation phase does not spoil the successful stabilization of the electroweak scale. In addition, the generation of the back-reaction potential that ends the second relaxation phase can be associated to a strong first order phase transition. We then study when such transition can generate a gravitational wave signal in the range of detectability of future interferometer experiments.

scholarly journals Gravitational waves from the first order electroweak phase transition in the Z3 symmetric singlet scalar model

2018 ◽  
Vol 168 ◽  
pp. 05001 ◽  
Author(s):  
Toshinori Matsui
Keyword(s):  
Phase Transition ◽  
Gravitational Waves ◽  
Higgs Sector ◽  
Electroweak Symmetry ◽  
Scalar Model ◽  
Electroweak Phase Transition ◽  
First Order ◽  
First Order Phase Transition ◽  
First Order Phase ◽  
The Universe

Among various scenarios of baryon asymmetry of the Universe, electroweak baryogenesis is directly connected with physics of the Higgs sector. We discuss spectra of gravitational waves which are originated by the strongly first order phase transition at the electroweak symmetry breaking, which is required for a successful scenario of electroweak baryogenesis. In the Z3 symmetric singlet scalar model, the significant gravitational waves are caused by the multi-step phase transition. We show that the model can be tested by measuring the characteristic spectra of the gravitational waves at future interferometers such as LISA and DECIGO.

Dynamical Evolution of the Universe in the Quark-Hadron Phase Transition and Nugget Formation

2005 ◽  
Vol 201 ◽  
pp. 461-462
Author(s):  
Ashok. Goyal ◽  
Deepak. Chandra
Keyword(s):  
Phase Transition ◽  
Early Universe ◽  
Dynamical Evolution ◽  
First Order ◽  
Evolution Of The Universe ◽  
Hadron Phase ◽  
First Order Phase Transition ◽  
Nugget Formation ◽  
First Order Phase ◽  
The Universe

We study the dynamics of first-order phase transition in the early Universe when it was 10 −50μs old with quarks and gluons condensing into hadrons. We look at the evolution of the Universe in small as well as large super cooling scenario.

scholarly journals Gravitational waves from dark Yang-Mills sectors

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
James Halverson ◽  
Cody Long ◽  
Anindita Maiti ◽  
Brent Nelson ◽  
Gustavo Salinas
Keyword(s):  
Phase Transition ◽  
Gravitational Waves ◽  
Gluon Plasma ◽  
Dark Sector ◽  
Gauge Groups ◽  
Yang Mills ◽  
First Order ◽  
First Order Phase Transition ◽  
First Order Phase ◽  
The Universe

Abstract Dark Yang-Mills sectors, which are ubiquitous in the string landscape, may be reheated above their critical temperature and subsequently go through a confining first-order phase transition that produces stochastic gravitational waves in the early universe. Taking into account constraints from lattice and from Yang-Mills (center and Weyl) symmetries, we use a phenomenological model to construct an effective potential of the semi quark-gluon plasma phase, from which we compute the gravitational wave signal produced during confinement for numerous gauge groups. The signal is maximized when the dark sector dominates the energy density of the universe at the time of the phase transition. In that case, we find that it is within reach of the next-to-next generation of experiments (BBO, DECIGO) for a range of dark confinement scales near the weak scale.

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.

scholarly journals Dark Matter production from relativistic bubble walls

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Aleksandr Azatov ◽  
Miguel Vanvlasselaer ◽  
Wen Yin
Keyword(s):  
Phase Transition ◽  
Dark Matter ◽  
Electroweak Phase Transition ◽  
First Order ◽  
Matter Production ◽  
First Order Phase Transition ◽  
Relic Abundance ◽  
Higgs Portal ◽  
First Order Phase ◽  
Gravitational Background

Abstract In this paper we present a novel mechanism for producing the observed Dark Matter (DM) relic abundance during the First Order Phase Transition (FOPT) in the early universe. We show that the bubble expansion with ultra-relativistic velocities can lead to the abundance of DM particles with masses much larger than the scale of the transition. We study this non-thermal production mechanism in the context of a generic phase transition and the electroweak phase transition. The application of the mechanism to the Higgs portal DM as well as the signal in the Stochastic Gravitational Background are discussed.

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