Displaying all lectures given by: Alexander Westphal

PIRSA:10060017  ( MP4 Medium Res , MP3 , PDF ) Which Format?
A comment on gravitational waves and the scale of supersymmetry breaking
Speaker(s): Alexander Westphal
Abstract: It has been suggested, by Kallosh and Linde, that a generic bound on inflation in string theory keeps the Hubble scale of inflation $H$ smaller than the gravitino mass, $m_{3/2}$. Given that models with low-energy supersymmetry have $m_{3/2}$ smaller than a TeV, this is a severe constraint, and w... read more
Date: 16/06/2010 - 3:45 pm

PIRSA:08060140  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Monodromy in the CMB: Gravity Waves and String Inflation
Speaker(s): Alexander Westphal
Abstract: We present a simple mechanism for obtaining large-field inflation, and hence a gravitational wave signature, from string theory compactified on twisted tori. For Nil manifolds, we obtain a leading inflationary potential proportional to phi^(2/3) in terms of the canonically normalized field phi, yiel... read more
Date: 03/06/2008 - 5:00 pm
Collection: PASCOS 08
Valid XHTML 1.0!