PIRSA:C08015 - In Search for Variations of Fundamental Couplings and Mass Scales - 2008PODCAST Subscribe to podcast

Maxim Pospelov and Victor Flambaum TBC ** timing issues because of Victor's visit and other conferences.


Collection URL: http://pirsa.org/C08015

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PIRSA:08070015  ( MP4 Medium Res , MP3 , PDF ) Which Format?
How to test mutiverse theories
Speaker(s): Lee Smolin
Date: 15/07/2008 - 3:20 pm

PIRSA:08070016  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Hadronic Mass Variation in Big Bang Nucleosynthesis
Speaker(s): Julian Berengut
Abstract: I will present a brief introduction to Big Bang Nucleosynthesis theory and observation. I will then discuss BBN as a probe of hadronic mass variation in the very early universe, including comparison with the observed Li7 discrepancy. Finally I want to explore the possibility of overproducing Li6 by ... read more
Date: 16/07/2008 - 9:30 am

PIRSA:08070017  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Conceptual problems in phenomenological interpretation in searches for variation of constants and violation of various invariances
Speaker(s): Savely Karshenboim
Abstract: At present a number of current or proposed experiments are directed towards a search for a `new physics' by detecting variations of fundamental physical constants or violations of certain basic symmetries. Various problems related to the phenomenology of such experiments will be considered.
Date: 16/07/2008 - 10:40 am

PIRSA:08070018  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Laboratory search for temporal variations of fundamental constants with optical clocks
Speaker(s): Ekkehard Peik
Abstract: Optical frequency standards based on forbidden transitions of trapped and laser-cooled ions have now achieved significantly higher stability and greater accuracy than primary cesium clocks. At PTB we investigate an optical clock based on the electric quadrupole transition S1/2 – D3/2 at 688 THz in... read more
Date: 16/07/2008 - 11:20 am

PIRSA:08070025  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Precision microwave oscillators and interferometers to test Lorentz Invariance and Local Position Invariance
Speaker(s): Michael Tobar
Abstract: We present recent and ongoing work that uses precision frequency generation and phase measurement to test the constancy of the speed of light Local Position Invariance (LPI) and the Lorentz Invariance (LI) of the photon with respect to the Standard Model of Particle Physics under the frame work of t... read more
Date: 16/07/2008 - 2:00 pm

PIRSA:08070020  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Single-atom Optical Clocks and Fundamental Constants
Speaker(s): James Bergquist
Date: 16/07/2008 - 2:40 pm

PIRSA:08070021  ( MP4 Medium Res , MP3 , PDF ) Which Format?
High accuracy 87Sr atomic lattice clock for laboratory measurements of alpha variation.
Speaker(s): Jan Thomsen
Abstract: High precision measurements in atomic and molecular systems have reached unprecedented accuracy owing to the state-of-the-art quantum control of both light and matter. We have recently completed an evaluation of the uncertainty of our 87Sr optical lattice clock at the 1x10e-16 fractional level, surp... read more
Date: 16/07/2008 - 3:50 pm

PIRSA:08070032  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Stringent constraint on variation in mu from three quasar spectra
Speaker(s): Julian King
Abstract: We have used molecular hydrogen transitions in high quality spectra of quasars Q0403-443, Q0347-383 and Q0528-250, to search for a change in the proton-to-electron mass ratio, mu. Our improvement on previous works is twofold. Firstly, we use an improved technique to calibrate the wavelength scale of... read more
Date: 17/07/2008 - 9:30 am

PIRSA:08070019  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Search for temporal variation of alpha in radio-frequency transitions of atomic dysprosium.
Speaker(s): Dmitry Budker
Date: 17/07/2008 - 10:40 am

PIRSA:08070026  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Enhanced Sensitivity to Variation of me/mp in Molecular Spectra
Speaker(s): Eric Hudson
Abstract: We propose new experiments with high sensitivity to a possible variation of the electron-to-proton mass ratio µ me/mp. We consider a nearly degenerate pair of molecular vibrational levels, each associated with a different electronic potential. With respect to a change in µ, the change in the split... read more
Date: 17/07/2008 - 11:20 am

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