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This Week at Physics

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Events During the Week of November 30th through December 7th, 2014

Monday, December 1st, 2014

R. G. Herb Condensed Matter Seminar
Time: 10:00 am
Place: 5310 Chamberlin Hall
Speaker: Seto Balian, University College London
Abstract: TBD
Host: Sue Coppersmith
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Plasma Physics (Physics/ECE/NE 922) Seminar
Initial Computations of Vertical Displacement Events with NIMROD
Time: 12:00 pm
Place: 2535 Engineering Hall
Speaker: Carl Sovinec, UW
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Cosmology Journal Club
An Informal discussion about a broad variety of arXiv papers related to Cosmology
Time: 12:15 pm
Place: 5242 Chamberlin Hall
Abstract: Please visit the following link for more details:
Please feel free to bring your lunch!
If you have questions or comments about this journal club, would like to propose a topic or volunteer to introduce a paper, please email Le Zhang (lzhang263@wisc.edu)
Host: Peter Timbie
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Tuesday, December 2nd, 2014

Chaos & Complex Systems Seminar
'Real School' : The tension of standard structures and varied social processes in schools
Time: 12:05 pm
Place: 4274 Chamberlin Hall (Refreshments will be served)
Speaker: Mary Metz, School of Education
Abstract: Over the last century and a half many aspects of schooling, especially secondary schooling, have been standardized and their form, despite some changes, has been remarkably resilient. Patterns of legitimate, “real” school are deeply embedded in social expectations. At the same time, we know that effective teachers create routines and atmospheres that vary widely. Some individual students thrive better with some approaches, others with others. Further, (though less well documented) community context and students’ social class and ethnicity have a big effect on what happens in classrooms. Nonetheless, over the last 35 years, there has been increasing societal pressure to standardize the substance and practice of K-12 education yet further. This presentation explores the reasons for the persistent tension between standardization of routines and the need for wide variation and flexibility in actual instruction inside the classroom.
Host: Clint Sprott
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Theory Seminar (High Energy/Cosmology)
Dark Matter in Dilepton Production
Time: 3:30 pm
Place: 5280 Chamberlin Hall
Speaker: Nirmal Raj, University of Oregon
Abstract: At the LHC a standard search channel for new physics is the production of a pair of leptons. New resonances or contact operators can be gleaned from peaks or broad deviations respectively in the invariant mass distribution (mll) of this channel. I'll demonstrate in this talk how hidden sectors can show up in dileptonic events through radiative corrections to the Standard Model process, giving rise to unique features in mll, as well as in leptonic angular distributions. One compelling possibility that can be probed is that of dark matter with scalar messengers coupling it to the quarks and leptons. I will present constraints from dilepton spectrum measurements at the LHC and dark matter experiments, and make predictions for the bounds from the high luminosity 14 TeV LHC as well as a 100 TeV collider.
Host: Ran Lu
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Wednesday, December 3rd, 2014

No events scheduled

Thursday, December 4th, 2014

NPAC (Nuclear/Particle/Astro/Cosmo) Forum
Title to be announced
Time: 2:30 pm
Place: 5280 Chamberlin Hall
Speaker: Peter Denton, Vanderbilt University
Abstract: TBA
Host: Westerhoff
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Astronomy Colloquium
Cosmic-Ray Ionization Rates in the Galactic ISM
Time: 3:30 pm
Place: 4421 Sterling Hall
Speaker: Nick Indriolo, University of Michigan
Abstract: Cosmic rays play a vital role in initiating the chemistry that occurs in molecular clouds. The ionization of H and H2 begins a network of ion-molecule reactions responsible for generating many of the diatomic and small polyatomic molecules observed in the interstellar medium. A few such species---HCO+, DCO+, OH+, H2O+, and H3+ in particular---are formed and destroyed by rather simple processes, making them powerful probes of the cosmic-ray ionization rate. I will discuss the current status of observations of these molecular ions within our Galaxy, as well as the conclusions that can be drawn from this ever-growing sample.
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Friday, December 5th, 2014

Physics Department Colloquium
Deep, Dark Detection: the DEAP-3600 Dark Matter Experiment
Time: 3:30 pm
Place: 2241 Chamberlin Hall (coffee at 4:30 pm)
Speaker: Art McDonald, SNOLAB
Abstract: A wide variety of astronomical observations appear to indicate the existence of Dark Matter particles making up about 25% of the Universe. However, to date there has been no conclusive direct observation of these particles. The DEAP-3600 Dark Matter Detector will use 3600 kg of liquid argon for a sensitive search for Weakly Interacting Massive Particles (WIMPS) 2 km underground in the SNOLAB international laboratory near Sudbury, Canada. Pulse shape discrimination in the light output will be used to avoid radioactive background from 39Ar beta decay in the liquid argon. Great care in the control of local radioactivity and the reduction in cosmic ray background due to the great depth will enable the use of an almost background-free fiducial volume of 1000 kg. This will provide a sensitivity of about 10-46 cm2 for 100 GeV WIMPS after 3 years of operation, beginning early in 2015. This is substantially better than current limits for the spin-dependent interaction. Details of the detector and its construction status will be presented.
Host: Francis Halzen
Poster: http://www.physics.wisc.edu/twap/posters/2014/3393.pdf
Video: http://www.physics.wisc.edu/vod/2014/12/05.html
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