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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Andrew Frey


PIRSA:19040132  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Separating brane-flux degrees of freedom
Speaker(s): Andrew Frey
Abstract: In string backgrounds with flux and branes, there are subtleties in identifying the independent, globally-defined degrees of freedom due to required gauge patching, which we illustrate with background flux. Work by Cariglia and Lechner (extending Dirac and Teitelboim) allows separation of D-brane an... read more
Date: 30/04/2019 - 2:30 pm

PIRSA:18050063  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Phases of Gravitational Collapse in AdS
Speaker(s): Andrew Frey
Abstract: Generically, a small amount of matter introduced to anti-de Sitter spacetime leads to formation of a black hole; however, the high degree of symmetry of AdS means that some initial distributions of matter (possibly also technically generic) oscillate indefinitely. Whether a given initial profile lea... read more
Date: 23/05/2018 - 11:00 am

PIRSA:13020139  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Gamma Rays at 130 GeV and How They Might Come from Dark Matter
Speaker(s): Andrew Frey
Abstract: Gamma Rays at 130 GeV and How They Might Come from Dark Matter" I'll discuss the exciting (but somewhat controversial) new discovery of a sharp gamma ray feature at 130 GeV from near the galactic center and review some other evidence that might link it to annihilation of dark matter. I will t... read more
Date: 21/02/2013 - 1:00 pm

PIRSA:09070026  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Dark Matter in Holographic Geometry
Speaker(s): Andrew Frey
Abstract: TBA
Date: 17/07/2009 - 4:00 pm

PIRSA:09020014  ( MP4 Medium Res , MP3 , PDF ) Which Format?
An Inverted Mass Hierarchy for Excited Dark Matter
Speaker(s): Andrew Frey
Abstract: Varied experimental results have recently sparked theoretical interest in the dark matter sector. I will review some of these results and the basic ideas in particle physics that might explain them, as well as some requirements for those models to work. Then I'll discuss a new model dark matter sect... read more
Date: 24/02/2009 - 2:00 pm

PIRSA:08060131  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Backreaction in Closed String Tachyon Condensation
Speaker(s): Andrew Frey
Abstract: Working in the weak tachyon region of a condensing tachyon background, we find the modified equations of motion for massless strings with conformal perturbation theory. We then estimate the backreaction on the background dilaton. In large (supercritical) dimensions, we find that the backreaction can... read more
Date: 03/06/2008 - 3:30 pm
Collection: PASCOS 08
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