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This Week at Physics

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Events on Friday, November 22nd, 2013

Theory Seminar (High Energy/Cosmology)
The Holomorphic Higgs Portal -- General Methods for the Higgs Lagrangian
Time: 2:00 pm
Place: 5280 Chamberlin Hall
Speaker: Piyush Kumar, Yale University
Abstract: We develop a systematic and general approach to study the Effective Higgs Lagrangian in a framework in which the Higgs fields in the visible sector couple to another sector via the superpotential. The extra sector is assumed to be super-conformal in the ultra-violet (UV) but develops a mass-gap with supersymmetry breaking in the infra-red (IR) close to the TeV scale. The main technique used in the approach is that of the Operator Product Expansion (OPE). By using OPE methods, we are able to compute the parameters in the Higgs Lagrangian to quadratic order and make general statements that are applicable to many classes of models. Not only does this approach allow us to understand the traditional problems plaguing simple models from a deeper perspective, it also provides new possibilities for solutions of these problems. The methods and results of our work should be very useful in eventually constructing a fully viable electroweak-natural model of Beyond-the-Standard Model physics.
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Physics Department Colloquium
First results from the LUX dark matter experiment at the Sanford Underground Research Facility
Time: 3:30 pm
Place: 2241 Chamberlin Hall (coffee at 4:30 pm)
Speaker: Daniel McKinsey, Yale University
Abstract: The LUX (Large Underground Xenon) experiment aims at the direct detection of dark matter particles via their collisions with xenon nuclei. The 350 kg two-phase dual-phase xenon time-projection chamber operating at the Sanford Underground Research Facility (Lead, South Dakota), was cooled and filled in February 2013. Results of the first WIMP search dataset, taken during the period April to August 2013, corresponding to 85.3 live-days of data with a fiducial volume of 118 kg, are presented.
Host: Bai
Poster: http://www.physics.wisc.edu/twap/posters/2013/3109.pdf
Video: http://www.physics.wisc.edu/vod/2013/11/22.html
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