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Chern-Simons production during preheating in hybrid inflation models

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dc.creator García-Bellido, Juan
dc.creator García Pérez, Margarita
dc.creator González-Arroyo, Antonio
dc.date 2008-07-02T10:40:11Z
dc.date 2008-07-02T10:40:11Z
dc.date 2003-09-16
dc.date.accessioned 2017-01-31T02:18:10Z
dc.date.available 2017-01-31T02:18:10Z
dc.identifier arXiv:hep-ph/0304285v2
dc.identifier Phys.Rev. D 69 (2004) 023504
dc.identifier 0556-2821
dc.identifier http://hdl.handle.net/10261/5512
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/5512
dc.description PACS 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.
dc.description We 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.
dc.description This work was supported in part by a CICYT project FPA2000-980.
dc.description Peer reviewed
dc.format 1295375 bytes
dc.format application/pdf
dc.language eng
dc.publisher American Physical Society
dc.relation IFT-UAM/CSIC-03-13
dc.relation FT-UAM-03/07
dc.relation Preprint
dc.rights openAccess
dc.subject High Energy Physics - Phenomenology
dc.subject High Energy Physics - Lattice
dc.subject High Energy Physics - Theory
dc.title Chern-Simons production during preheating in hybrid inflation models
dc.type Pre-print

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