SÉMINAIRE DU GRECO
"A Terminal Velocity in Higher Dimensional Field Spaces and Trapped Inflation" |
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T. Battefeld |
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I investigate particle production near extra species loci (ESL) in a higher dimensional field space and derive a speed limit in moduli space at weak coupling. This terminal velocity is set by the characteristic ESL-separation and the coupling of the extra degrees of freedom to the moduli, but it is independent of the moduli''s potential if the dimensionality of the field space is considerably larger than the dimensionality of the loci. Once the terminal velocity is approached, particles are produced at a plethora of nearby ESLs, preventing a further increase in speed via their backreaction. It is possible to drive inflation at the terminal velocity, providing a generalization of trapped inflation with attractive features. I comment on observational signatures and give a brief outlook on work in progress. |
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lundi 21 mars 2011 - 11:00 Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris |
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