English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/5512
Share/Impact:
Statistics
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Chern-Simons production during preheating in hybrid inflation models

AuthorsGarcía-Bellido, Juan ; García Pérez, Margarita ; González-Arroyo, Antonio
KeywordsHigh Energy Physics - Phenomenology
High Energy Physics - Lattice
High Energy Physics - Theory
Issue Date16-Sep-2003
PublisherAmerican Physical Society
CitationarXiv:hep-ph/0304285v2
Phys.Rev. D 69 (2004) 023504
SeriesIFT-UAM/CSIC-03-13
FT-UAM-03/07
AbstractWe study the onset of symmetry breaking after hybrid inflation in a model having the field content of the SU(2) gauge-scalar sector of the standard model, coupled to a singlet inflaton. This process is studied in (3+1)-dimensions in a fully non-perturbative way with the help of lattice techniques within the classical approximation. We focus on the role played by gauge fields and, in particular, on the generation of Chern-Simons number. Our results are shown to be insensitive to the various cut-offs introduced in our numerical approach. The spectra preserves a large hierarchy between long and short-wavelength modes during the whole period of symmetry breaking and Chern-Simons generation, confirming that the dynamics is driven by the low momentum sector of the theory. We establish that the Chern-Simons production mechanism is associated with local sphaleron-like structures. The corresponding sphaleron rates are of order 10^{-5} m^4, which, within certain scenarios of electroweak baryogenesis and a (not unnaturally large) additional source of CP violation, could explain the present baryon asymmetry of the universe.
DescriptionPACS numbers: 98.80.Cq.-- 28 pages, 15 figures, ReVTeX.-- Submitted on 30 Apr 2003 (v1), last revised 16 Sep 2003 (this version, v2).-- With minor corrections, version to appear in Phys. Rev. D.
URIhttp://hdl.handle.net/10261/5512
ISSN0556-2821
Appears in Collections:(IFT) Artículos
Files in This Item:
File Description SizeFormat 
0304285v2.pdf1,27 MBAdobe PDFThumbnail
View/Open
Show full item record
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.