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Title: Baryogenesis and gravitational waves from runaway bubble collisions

Abstract

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.

Authors:
 [1];  [2];  [3]
  1. Theory Division, CERN,CH-1211 Geneva 23 (Switzerland)
  2. (CAP),Université de Genève, 24 quai Ansermet, CH-1211 Genève 4 (Switzerland)
  3. Département de Physique Théorique and Center for Astroparticle Physics (CAP),Université de Genève, 24 quai Ansermet, CH-1211 Genève 4 (Switzerland)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22572179
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2016; Journal Issue: 11; Other Information: PUBLISHER-ID: JCAP11(2016)011; OAI: oai:repo.scoap3.org:17884; cc-by Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASYMMETRY; BARYONS; BUBBLES; COSMOLOGY; GRAVITATIONAL WAVES; INTERFEROMETRY; PARTICLE PRODUCTION; PHASE TRANSFORMATIONS; POSTULATED PARTICLES; STANDARD MODEL; UNIVERSE

Citation Formats

Katz, Andrey, Département de Physique Théorique and Center for Astroparticle Physics, and Riotto, Antonio. Baryogenesis and gravitational waves from runaway bubble collisions. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/11/011.
Katz, Andrey, Département de Physique Théorique and Center for Astroparticle Physics, & Riotto, Antonio. Baryogenesis and gravitational waves from runaway bubble collisions. United States. doi:10.1088/1475-7516/2016/11/011.
Katz, Andrey, Département de Physique Théorique and Center for Astroparticle Physics, and Riotto, Antonio. Mon . "Baryogenesis and gravitational waves from runaway bubble collisions". United States. doi:10.1088/1475-7516/2016/11/011.
@article{osti_22572179,
title = {Baryogenesis and gravitational waves from runaway bubble collisions},
author = {Katz, Andrey and Département de Physique Théorique and Center for Astroparticle Physics and Riotto, Antonio},
abstractNote = {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.},
doi = {10.1088/1475-7516/2016/11/011},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 11,
volume = 2016,
place = {United States},
year = {Mon Nov 07 00:00:00 EST 2016},
month = {Mon Nov 07 00:00:00 EST 2016}
}