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Events on Tuesday, April 3rd, 2018

Chaos & Complex Systems Seminar
The invention of public radio at the UW--Madison Physics Department, 1917-1919
Time: 12:05 pm - 1:00 pm
Place: 4274 Chamberlin (Refreshments will be served)
Speaker: Jim Reardon, UW Department of Physics
Abstract: From April 1917-March 1919 Prof. Earle Terry of the UW-Physics Department was able to continue research in wireless voice telephony--what we would now call AM radio--while all through the rest of the world, non-military radio research was halted by World War I. By the end of this time, he and graduate student Cyril Jansky were able to make triode vacuum tubes capable of dissipating more than 50 W, allowing his station 9XM to transmit voice intelligible at a range of 130 miles. Terry and Jansky freely shared their work with researchers at other Universities, which contributed to the proliferation of College and University radio stations in the 1920's, the ancestors of what we now know as public radio. The talk will feature a replica of the original 9XM transmitter, constructed as part of the celebration of the centennial of the Ingersoll Physics Museum.
Host: Clint Sprott
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"Physics Today" Undergrad Colloquium (Physics 301)
Cloud Quantum Computing
Time: 1:20 pm - 2:10 pm
Place: 2241 Chamberlin Hall
Speaker: Maxim G Vavilov, UW Madison Department of Physics
Host: Wesley Smith
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Theory Seminar (High Energy/Cosmology)
Higgs Couplings at High Scales
Time: 3:30 pm
Place: 5280 Chamberlin Hall
Speaker: Tao Han, University of Pittsburg
Abstract: The experiments at the LHC have been improving the measurements of the Higgs boson properties, and searches for new physics are being actively conducted. In the absence of deviations from the Standard Model thus far, it would be prudent to seek for other complementary strategies in the experiments at the energy frontier. For this purpose, we propose to study the Higgs couplings at high energy scales. We focus on the energy scale-dependence of the off-shell Higgs propagation, and of the top quark Yukawa coupling, exploiting the signal process gg —> h* —> ZZ*. We present several representative scenarios relevant to addressing the naturalness problem. We find that certain scenarios are potentially observable at the LHC upgrade to a high luminosity or higher energy.
Host: Vernon Barger
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