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Events at Physics

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Events During the Week of October 3rd through October 10th, 2010

Monday, October 4th, 2010

Plasma Physics (Physics/ECE/NE 922) Seminar
"Propagation of Large-scale Structures in Plasma Turbulence"
Time: 12:05 pm
Place: 2535 Engineering Hall
Speaker: Olaf Grulke, MPI for Plasma Physics, Greifswald, Germany
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High Energy Seminar
Measurement of the WW+WZ Production Cross Section in the Lepton+Jets Final State at CDF Using the Di-jet Invariant Mass.
Time: 2:00 pm
Place: 5310 Chamberlin
Speaker: Pierluigi Catastini, Fermilab
Abstract: The study of Di-boson production represents an important part of the Electroweak Physics program in 1.96 TeV p p-bar collision at the CDF experiment . Di-bosons are of great interest because they provide unique opportunities to test the Standard Model at the TeV scale. Moreover, the process WW+WZ -&amp;amp;gt; l nu + jj shares the same event topology of WH -&amp;amp;gt; l nu + b b-bar, the golden channel for low mass Higgs searches at CDF. As a consequence, establishing Di-boson production with jets in the final state represents a crucial milestone for the development and understanding of techniques used in Higgs boson searches at the Tevatron. In this seminar, we will focus on the observation of Di-boson production at CDF in the lepton-missing Energy +jets final state by looking at the Di-jet invariant mass.
Host: Matthew Herndon
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Plasma Theory Seminar
"Effects of 3D Magnetic Perturbations on Toroidal Plasmas"
Time: 4:00 pm
Place: 514 ERB
Speaker: James Callen, UW-Madison Engineering Physics
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Tuesday, October 5th, 2010

R. G. Herb Condensed Matter Seminar
Probing non-Abelian statistics with quantum Hall interferometry
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Kirill Shtengel, University of California-Riverside
Abstract: States of matter are conventionally classified according to broken symmetries. Topologically ordered phases fall outside of this paradigm: with no local order parameter, they nevertheless have many peculiar properties setting them apart from disordered phases. In 2D, such phases may support anyons - quasiparticles that are neither bosons nor fermions. Moreover, anyons with non-Abelian statistics can occur, particularly in the fractional quantum Hall regime. In this talk, I will focus on solid state interferometers designed to detect such exotic statistics. I will discuss recent experiments in the the quantum Hall regime at 5/2 filling where the evidence for the existence of non-Abelian anyons may have in fact been observed for the first time. I will also mention potential applications of such interferometeric schemes for topological quantum computation.
Host: Andrey Chubukov & Robert Joynt
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Chaos & Complex Systems Seminar
"Sustainability: The Lay of the Land for 2010"
Time: 12:05 pm
Place: 4274 Chamberlin Hall
Speaker: Tom Eggert, UW-Madison School of Business
Abstract: Tom Eggert is the Co-Director of the Business, Environment & Social Responsibility Program at the WI School of Business, and also is the Executive Director of the WI Sustainable Business Council. His talk will focus on the adoption of "green" or sustainable practices by institutions throughout the state.
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Department of Physics
Pizza Lunch with Jennifer Ouellette
Time: 12:15 pm
Place: 5310 Chamberlin
Speaker: Jennifer Ouellette, UW “Science Writer in Residence” blogger at Cocktail Party Physics and author
Abstract: Please come by to meet her and discuss the intersection of science and popular culture. Jennifer Ouellette is the UW "Science Writer in Residence" blogger at Cocktail Party Physics and author of popular science books, including "Black Bodies and Quantum Cats: Tales from the Annals of Physics" and "The Physics of the Buffyverse."

Cocktail Party Physics Website
http://twistedphysics.typepad.com

Jennife Ouellette's Website
http://www.jenniferouellette-writes.com
Poster: https://www.physics.wisc.edu/events/posters/2010/1992.pdf
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Wednesday, October 6th, 2010

Department Meeting
Time: 12:15 pm
Place: 5310 Chamberlin Hall
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Thursday, October 7th, 2010

Astronomy Colloquium
Casting Shadows on the standard intersteller medium paradign with GALFA-HI
Time: 3:30 pm
Place: 4421 Sterling Hall Same Location
Speaker: Josh Peek, Columbia University
Abstract: Our understanding of the diffuse interstellar medium (ISM) revolves around the balance of pressures between warm and cold phases and the interruption of that balance by the explosion of stars in supernovae. I will show new results enabled by the GALFA-HI survey that throw these standard theoretical underpinnings into disarray. I will discuss our investigation of the nearest cold neutral medium (CNM) to the sun, deep within the boundaries of the local cavity. High spectral resolution observations of this object present interesting constraints to theorists and simulators who propose that CNM clouds are formed by the collision of warmer clouds. Observations of the absorption of soft X-rays by this CNM show that X-rays emanate much nearer to the sun than was thought before, casting doubt on the local hot bubble theory. We have also investigated hundreds of compact HI clouds in our Galaxy, many of which seem to be in extreme force imbalance with the expected ambient ISM. These finding all suggest we have much to learn about the Galactic ISM we call home.
Host: Snezana Stanimirovic
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NPAC (Nuclear/Particle/Astro/Cosmo) Forum
Dark matter, under different angles
Time: 4:00 pm
Place: 4274 Chamberlin Hall
Speaker: Alberto Vallinoto, Fermilab
Abstract: Most often, the dark matter puzzle is analyzed along a single perspective, thus trying to answer a single question. Either "what is the dark matter?", focusing on its microscopic nature, or "how is dark matter distributed?" and "how does it cluster?" focusing on the large scale structure of the universe, or still "how does it
affect what we observe in the sky?", focusing on gravitational lensing. Both my scientific interests and some random fluctuations at the beginning of my career have conspired so that I would take on projects in all these fields. Leaving aside the ambition -- and the impossible task -- to be comprehensive, I will review some interesting aspects of these fields and some of my contributions.
Host: Peter Timbie
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Graduate Introductory Seminar
Condensed Matter Theory
Time: 5:30 pm
Place: 2223 Chamberlin Hall
Speaker: Bruch, Chubukov, Coppersmith, Joynt, Perkins, Vavilov
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Friday, October 8th, 2010

Theory/Phenomenology Seminar
Dark Light Higgs
Time: 2:30 pm
Place: 5280 Chamberlin Hall
Speaker: Hao Zhang, University of Chicago
Host: Pavel Fileviez Perez
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