| 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 |
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| dc.format |
application/pdf |
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| 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 |
|