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Baryogenesis and Gravitational Waves from Runaway Bubble Collisions

We propose a novel mechanism for production of baryonic asymmetry in the early Universe. The mechanism takes advantage of the strong first order phase transition that produces runaway bubbles in the hidden sector that propagate almost without friction with ultra-relativistic velocities. Collisions o...

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Detalles Bibliográficos
Autores principales: Katz, Andrey, Riotto, Antonio
Lenguaje:eng
Publicado: 2016
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2016/11/011
http://cds.cern.ch/record/2203671
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author Katz, Andrey
Riotto, Antonio
author_facet Katz, Andrey
Riotto, Antonio
author_sort Katz, Andrey
collection CERN
description We propose a novel mechanism for production of baryonic asymmetry in the early Universe. The mechanism takes advantage of the strong first order phase transition that produces runaway bubbles in the hidden sector that propagate almost without friction with ultra-relativistic velocities. Collisions of such bubbles can non-thermally produce heavy particles that further decay out-of-equilibrium into the SM and produce the observed baryonic asymmetry. This process can proceed at the very low temperatures, providing a new mechanism of post-sphaleron baryogenesis. In this paper we present a fully calculable model which produces the baryonic asymmetry along these lines as well as evades all the existing cosmological constraints. We emphasize that the Gravitational Waves signal from the first order phase transition is completely generic and can potentially be detected by the future eLISA interferometer. We also discuss other potential signals, which are more model dependent, and point out the unresolved theoretical questions related to our proposal.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
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spelling cern-22036712022-08-10T12:36:01Zdoi:10.1088/1475-7516/2016/11/011http://cds.cern.ch/record/2203671engKatz, AndreyRiotto, AntonioBaryogenesis and Gravitational Waves from Runaway Bubble CollisionsParticle Physics - PhenomenologyWe propose a novel mechanism for production of baryonic asymmetry in the early Universe. The mechanism takes advantage of the strong first order phase transition that produces runaway bubbles in the hidden sector that propagate almost without friction with ultra-relativistic velocities. Collisions of such bubbles can non-thermally produce heavy particles that further decay out-of-equilibrium into the SM and produce the observed baryonic asymmetry. This process can proceed at the very low temperatures, providing a new mechanism of post-sphaleron baryogenesis. In this paper we present a fully calculable model which produces the baryonic asymmetry along these lines as well as evades all the existing cosmological constraints. We emphasize that the Gravitational Waves signal from the first order phase transition is completely generic and can potentially be detected by the future eLISA interferometer. We also discuss other potential signals, which are more model dependent, and point out the unresolved theoretical questions related to our proposal.We propose a novel mechanism for production of baryonic asymmetry in the early Universe. The mechanism takes advantage of the strong first order phase transition that produces runaway bubbles in the hidden sector that propagate almost without friction with ultra-relativistic velocities. Collisions of such bubbles can non-thermally produce heavy particles that further decay out-of-equilibrium into the SM and produce the observed baryonic asymmetry. This process can proceed at the very low temperatures, providing a new mechanism of post-sphaleron baryogenesis. In this paper we present a fully calculable model which produces the baryonic asymmetry along these lines as well as evades all the existing cosmological constraints. We emphasize that the Gravitational Waves signal from the first order phase transition is completely generic and can potentially be detected by the future eLISA interferometer. We also discuss other potential signals, which are more model dependent, and point out the unresolved theoretical questions related to our proposal.CERN-TH-2016-173arXiv:1608.00583CERN-TH-2016-173oai:cds.cern.ch:22036712016-08-01
spellingShingle Particle Physics - Phenomenology
Katz, Andrey
Riotto, Antonio
Baryogenesis and Gravitational Waves from Runaway Bubble Collisions
title Baryogenesis and Gravitational Waves from Runaway Bubble Collisions
title_full Baryogenesis and Gravitational Waves from Runaway Bubble Collisions
title_fullStr Baryogenesis and Gravitational Waves from Runaway Bubble Collisions
title_full_unstemmed Baryogenesis and Gravitational Waves from Runaway Bubble Collisions
title_short Baryogenesis and Gravitational Waves from Runaway Bubble Collisions
title_sort baryogenesis and gravitational waves from runaway bubble collisions
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1088/1475-7516/2016/11/011
http://cds.cern.ch/record/2203671
work_keys_str_mv AT katzandrey baryogenesisandgravitationalwavesfromrunawaybubblecollisions
AT riottoantonio baryogenesisandgravitationalwavesfromrunawaybubblecollisions