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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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Limits from the Perturbative Regime of Inflation and Non-Gaussianity
Speaker(s): Louis Leblond
Abstract: The validity of the perturbative analysis during inflation imposes bounds on the inflationary parameters. For single field inflation, the current experimental bounds on non-Gaussianity necessarily imply that the physics is weakly coupled at CMB scales. In this talk, I will show that for models with ... read more
Date: 05/06/2008 - 3:45 pm
Collection: PASCOS 08

The potential of tomographic surveys to detect departures from GR growth
Speaker(s): Gong-Bo Zhao
Abstract: We study the possibility of detecting departures from GR using the tomographic surveys as Pan-starrs and LSST (Will be updated).
Date: 05/06/2008 - 3:45 pm
Collection: PASCOS 08

Improved ring potential of QED at finite temperature
Speaker(s): Neda Sadooghi
Abstract: Using the general structure of the vacuum polarization tensor at non-zero temperature T and finite magnetic field B, the ring contribution to QED effective potential is determined beyond the static (zero momentum) limit. In the limit of weak magnetic field and at high temperature, the improved ring ... read more
Date: 05/06/2008 - 3:45 pm
Collection: PASCOS 08

A new test of the concordance cosmology
Speaker(s): Rob Caldwell
Abstract: A new test of the LCDM concordance cosmology is presented.
Date: 05/06/2008 - 4:00 pm
Collection: PASCOS 08

New Results from the Pierre Auger Observatory
Speaker(s): Stefan Westerhoff
Abstract: The Pierre Auger Observatory in Malargue, Argentina, is the world's largest detector for the study of the origin of ultrahigh energy cosmic rays. The experiment stretches over 3000 km^2 and measures cosmic rays with energies above 10^18 eV using two complementary detector types: an array of 1600 par... read more
Date: 05/06/2008 - 4:00 pm
Collection: PASCOS 08

Cosmological Constraints and Fine-Tuning in Brane-antibrane Inflation Models
Speaker(s): Loison Hoi
Abstract: We systematically explore the parameter space of the state-of-the-art brane-antibrane inflation model (Baumann et al.) which is most rigorously derived from string theory, applying the COBE normalization and constraints on the spectral index. We define an effective volume in parameter space consiste... read more
Date: 05/06/2008 - 4:00 pm
Collection: PASCOS 08

Soft wall dynamics in AdS/QCD
Speaker(s): Brian Batell
Abstract: Linear confinement in holographic QCD can be obtained with a soft-wall quadratic dilaton background. We present a dynamical five-dimensional model realizing this setup and discuss the implications for the hypothetical string theory dual to QCD.
Date: 06/06/2008 - 9:00 am
Collection: PASCOS 08

Status of EXO-200
Speaker(s): Douglas Leonard
Abstract: Searches for neutrinoless double beta decays could determine if neutrinos are Majorana particles and could measure their absolute mass scale. The initial stage of the Enriched Xenon Observatory project, EXO-200, will look for two-neutrino and neutrinoless double-beta decays of Xe-136 in a liquid-xen... read more
Date: 06/06/2008 - 9:00 am
Collection: PASCOS 08

Higher Symmetry of Gravity and the Cosmological Constant Problem
Speaker(s): Jerzy Krol
Abstract: According to Doering and Isham the spectral topos corresponds to any quantum system. The descriptions of the systems become similar to these given by classical theories. Topoi can also modify local smooth spacetime structure. Supposing that a quantum system modifies the local spacetime structure and... read more
Date: 06/06/2008 - 9:00 am
Collection: PASCOS 08

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

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