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This Week at Physics

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Events During the Week of May 13th through May 20th, 2012

Monday, May 14th, 2012

No events scheduled

Tuesday, May 15th, 2012

NPAC (Nuclear/Particle/Astro/Cosmo) Forum
A neutrino beam to IceCube/PINGU?
Time: 3:00 pm
Place: 4274 Chamberlin Hall
Speaker: Walter Winter, University of Würzburg, Germany
Abstract: We discuss the physics potential of a neutrino beam sent from one of the major accelerator laboratories on the Northern hemisphere to possible upgrades of the DeepCore array, named PINGU or MICA. As one possibility, we demonstrate that due to the parametric enhancement of the oscillation probability using a core-crossing baseline, a NuMI-like superbeam to PINGU with a relatively low intensity could easily measure the mass hierarchy.
Host: Albrecht Karle
Presentation: http://www.physics.wisc.edu/twap/presentations/2671.ppt
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Wednesday, May 16th, 2012

No events scheduled

Thursday, May 17th, 2012

NPAC (Nuclear/Particle/Astro/Cosmo) Forum
Probing Time-reversal Invariance with Atoms and Neutrons
Time: 2:30 pm
Place: 4274 Chamberlin
Speaker: Tim Chupp, University of Michigan
Abstract: Time reversal is not a perfect symmetry of nature as evidenced by decays of K and B mesons. This means that physical processes and even the properties of atoms and elementary particles would change with the reversal of time. Assuming charge-conjugation-parity (CPT) invariance, T- invariance implies CP invariance, an essential element of baryogenesis, the generation of more matter, compared to antimatter, in the early universe. CP-invariance violation has been observed in the decays of K and B mesons, and is incorporated into the Standard Model of particle physics, but it it not sufficient to produced the observed baryon asymmetry. So we search on for new manifestations of CP or T invariance violation. Observing a permanent electric dipole moment of an atom or the neutron (sometimes called the Z=0 atom) would be direct evidence of T violation and would set the scale for new physics that could generate the baryon asymmetry. T-violating observables in neutron decay include the correlations of neutron spin with the proton and electron momentum. I will discuss EDM experiments using rare isotopes as well as neutron experiments including the recently complete emiT-II experiment.
Host: Michael Ramsey-Musolf
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Friday, May 18th, 2012

No events scheduled

"This Week at Physics" poster: http://www.physics.wisc.edu/twap/posters/2012/2012-05-14.pdf

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