QCD-induced Electroweak Phase Transition
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In this article, it was shown that the QCD condensates which subsequently form give an additional contribution to the radion/dilaton potential, an effect which had been ignored so far, which significantly reduces the barrier in the potential and allows the phase transition to complete in a substantially larger region of parameter space.Abstract:
Phase transitions associated with nearly conformal dynamics are known to lead to significant supercooling. A notorious example is the phase transition in Randall-Sundrum models or their CFT duals. In fact, it was found that the phase transition in this case is first-order and the tunneling probability for the radion/dilaton is so small that the system typically remains trapped in the false vacuum and the phase transition never completes. The universe then keeps expanding and cooling. Eventually the temperature drops below the QCD scale. We show that the QCD condensates which subsequently form give an additional contribution to the radion/dilaton potential, an effect which had been ignored so far. This significantly reduces the barrier in the potential and allows the phase transition to complete in a substantially larger region of parameter space. Due to the supercooling, electroweak symmetry is then broken simultaneously. This class of models therefore naturally leads to an electroweak phase transition taking place at or below QCD temperatures, with interesting cosmological implications and signatures.read more
Citations
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Detecting gravitational waves from cosmological phase transitions with LISA: an update
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TL;DR: In this paper, the potential for observing gravitational waves from cosmological phase transitions with LISA was investigated, based on current state-of-the-art simulations of sound waves in the cosmic fluid after the phase transition completes.
Journal ArticleDOI
Detecting gravitational waves from cosmological phase transitions with LISA: an update
Chiara Caprini,Mikael Chala,Mikael Chala,G. C. Dorsch,G. C. Dorsch,Mark Hindmarsh,Mark Hindmarsh,Stephan J. Huber,Thomas Konstandin,Jonathan Kozaczuk,Jonathan Kozaczuk,Jonathan Kozaczuk,Germano Nardini,Jose Miguel No,Jose Miguel No,Kari Rummukainen,Pedro Schwaller,Geraldine Servant,Anders Tranberg,David J. Weir,David J. Weir +20 more
TL;DR: In this paper, the potential for observing gravitational waves from cosmological phase transitions with LISA was investigated, based on current state-of-the-art simulations of sound waves in the cosmic fluid after the phase transition completes.
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