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This Week at Physics

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Events on Tuesday, September 9th, 2014

Chaos & Complex Systems Seminar
Upstairs/downstairs in our brains - What’s running our show?
Time: 12:05 pm
Place: 4274 Chamberlin Hall (Refreshments will be served)
Speaker: Deric Bownds, UW Department of Zoology
Abstract: This talk starts with some brief brain 101 elementary anatomy and then offers a cherry picking review of recent trends in brain systems research that correlate what is going on in our brains with our behaviors. We want to know what normally makes us tick, what distortions might underlie addictive, impulsive, aggressive, stressed, depressed, or anxious behaviors, and what therapies might counter these distortions. I will focus on structure-activity-behavior correlations in three brain state distinctions that are currently being emphasized: Upstairs/downstairs and attentional/default mode systems that are a spontaneous part of our normal behavioral repertoire, and the cognitive therapy or meditation systems whose training, development, and expression can alter them.
Host: Clint Sprott
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Theory Seminar (High Energy/Cosmology)
Search for LFV Higgs decays with the CMS experiment
Time: 3:00 pm
Place: 5280 Chamberlin Hall
Speaker: Maria Cepeda Hermida, University of Wisconsin
Abstract: The CMS experiment at the LHC performed the first direct search for lepton violating decays of the recently discovered Higgs boson, to a muon-tau pair. These decays are forbidden in the standard model, but arise naturally in beyond the standard scenarios such as models with more than one Higgs doublet, composite Higgs models, Randall-Sundrum models, and many others. The search is performed in the h->mu tau_e and h->mu tau_had channels, where tau_had and tau_e are taus reconstructed in the hadronic and electronic decay channels, respectively. The data sample used in the search corresponds to an integrated luminosity of 19.7 fb-1 collected in pp collisions at 8 TeV. The sensitivity of the search is an order of magnitude better than the existing indirect limits. A slightly excess of data with a significance of 2.5 sigma is observed. This results constrain the branching ratio of h->mu tau to < 1.57% at 95% CL. This branching ratio limit is then used to constrain the Y(mu tau) Yukawa couplings.
Host: Ran Lu
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