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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:C08012 - PASCOS 08PODCAST Subscribe to podcast

14th International Symposium on Particles, Strings and Cosmology (PASCOS '08)

Organizer(s): Robert Myers   Freddy Cachazo   Jaume Gomis   Cliff Burgess   Justin Khoury   James Taylor   Maxim Pospelov   Alex Buchel  

Collection URL: http://pirsa.org/C08012


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PIRSA:08060167  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Bubbles of Nothing and Violations of the Energy Conditions in AdS-CFT
Speaker(s): Keith Copsey
Abstract: I describe a variety of bubbles of nothing which do not require a Kaluza-Klein circle but instead may be found in asymptotically flat or AdS spaces without any identifications.  There are many such bubbles which expand outwards and threaten to destabilize spacetimes with more than four dimensions. ... read more
Date: 06/06/2008 - 9:15 am
Collection: PASCOS 08

PIRSA:08060170  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Beyond the big bang in Loop Quantum Cosmology
Speaker(s): Parampreet Singh
Abstract: Loop quantum cosmology is a non-perturbative canonical quantization of simple cosmological models based on loop quantum gravity. In recent years, a greater control on the underlying quantum theory has revealed a picture where the big bang is replaced by a quantum bounce at Planck scale. The evolutio... read more
Date: 06/06/2008 - 9:15 am
Collection: PASCOS 08

PIRSA:08060172  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Stochastic Inflation and Replica Field Theory
Speaker(s): Florian Kuhnel
Abstract: We formulate a general replica field-theoretic framework for stochastic inflation in which a manifestation of dimensional reduction is found. The scale above which the latter becomes dominant is explicitly calculated. It is found that for a wide class of stochastic systems considerable changes of th... read more
Date: 06/06/2008 - 9:30 am
Collection: PASCOS 08

PIRSA:08060173  ( MP4 Medium Res , MP3 , PDF ) Which Format?
CDM / LHC: How Robust is the Connection?
Speaker(s): Scott Watson
Abstract: One of the most compelling hints for physics beyond the standard model is the cosmological observation that nearly a quarter of our universe consists of cold dark matter. In the next few years, LHC shows the promise of producing these elusive particles and possibly measuring their microscopic proper... read more
Date: 06/06/2008 - 9:30 am
Collection: PASCOS 08

PIRSA:08060168  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Gravitational Bursts from Unstable Cosmic Strings
Speaker(s): Ben Shlaer
Abstract: We compute the GW signature of a meta-stable cosmic string network. Such networks arise in a large class of brane inflation models.
Date: 06/06/2008 - 9:30 am
Collection: PASCOS 08

PIRSA:08060174  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Flavon Inflation
Speaker(s): Stefan Antusch
Abstract: A new class of particle physics models of inflation is presented which is based on the phase transition associated with the spontaneous breaking of family symmetry responsible for the generation of the effective quark and lepton Yukawa couplings. We show
Date: 06/06/2008 - 9:45 am
Collection: PASCOS 08

PIRSA:08060175  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Probing the primordial helium abundance and the effective number of neutrino species with CMB
Abstract: We point out that light scalar fields with symmetries generically generate non-Gaussianity in the density fluctuations. Our observation makes the presence of the non-Gaussianity ubiquitous. When the inflationary scale and the properties of the scalar fields satisfy a certain relation, the non-Gaussi... read more
Date: 06/06/2008 - 9:45 am
Collection: PASCOS 08

PIRSA:08060169  ( MP4 Medium Res , MP3 , PDF ) Which Format?
A covariant entropy bound conjecture on dynamical horizon
Speaker(s): Hongbao Zhang
Abstract: After introduction and motivation, I will present a covariant entropy bound conjecture on dynamical horizon in a general sense. Then I will show its validity in black hole case and cosmological context. Especially its power in constraint on the cosmological constant is addressed. I will end up with ... read more
Date: 06/06/2008 - 9:45 am
Collection: PASCOS 08

PIRSA:08060145  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Can Dark Energy Have a Color?
Speaker(s): Dejan Stojkovic
Abstract: About 20-30 years ago, scientific community was interested in knowing whether dark matter can carry gauge charges. The answer was found to be no. Today, we can ask a similar question: Can dark energy carry gauge charges? The answer this time seems to be yes. We study the possibility that the current... read more
Date: 06/06/2008 - 10:00 am
Collection: PASCOS 08

PIRSA:08060176  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Experimental limits on kappa-Minkowski field theories
Speaker(s): Pavel Bolokhov
Abstract: The non-commutative kappa-Minkowski field theory, often tauted as a low-energy candidate for the quantum description of gravity, operates on a spacetime which possesses a modified Lorentz invariance, and as such can be probed in high-precision low-energy experiments. We study the first order correct... read more
Date: 06/06/2008 - 10:00 am
Collection: PASCOS 08

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