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Hybrid inflation exit through tunneling
KTH, School of Engineering Sciences (SCI), Theoretical Physics.
2007 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, no 1, 033- p.Article in journal (Refereed) Published
Abstract [en]

For hybrid inflationary potentials, we derive the tunneling rate from field configurations along the flat direction towards the waterfall regime. This process competes with the classically rolling evolution of the scalar fields and needs to be strongly subdominant for phenomenologically viable models. Tunneling may exclude models with a mass scale below 10(12) GeV, but can be suppressed by small values of the coupling constants. We find that tunneling is negligible for those models, which do not require fine tuning in order to cancel radiative corrections, in particular for GUT-scale SUSY inflation. In contrast, electroweak scale hybrid inflation is not viable, unless the inflaton-waterfall field coupling is smaller than approximately 10(-11).

Place, publisher, year, edition, pages
2007. no 1, 033- p.
Keyword [en]
cosmology of theories beyond the SM, solitons monopoles and instantons
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-37016DOI: 10.1088/1126-6708/2007/01/033ISI: 000244120200033ScopusID: 2-s2.0-33947702653OAI: diva2:431838
Available from: 2011-07-26 Created: 2011-07-26 Last updated: 2011-07-26Bibliographically approved

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