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Events on Tuesday, October 26th, 2021

Network in Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) Seminar
Comparing Supernova Models Using Past and Future Neutrino Data
Time: 2:00 pm - 3:00 pm
Speaker: Jackson Olsen , University of Minnesota
Abstract: Recent advances in state-of-the-art core-collapse supernova (CCSN) simulations have led to detailed predictions for the neutrino signal. These model predictions can be directly compared using observations. In this talk, I describe a Bayesian comparison of three CCSN neutrino emission models using the Kamiokande II data on SN 1987A. I then present an analysis of the capabilities of a water Cherenkov detector such as Super-Kamiokande to distinguish between these models in the event of a future Galactic CCSN.
Host: Baha Balantekin
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Theory Seminar (High Energy/Cosmology)
Muon g-2 Experiments as Dark Matter Detectors
Time: 4:00 pm - 5:00 pm
Place: Chamberlin 5280
Speaker: Ryan Janish, Fermilab
Abstract: We propose extending the search for dark matter (DM) by using muon spin targets. An ultralight DM background may apply an oscillating torque to muon spins, resulting in novel precession trajectories. A time-resolved reanalysis of muon precession data from the ongoing Fermilab g-2 experiment and from future g-2 and EDM measurements is sensitive to this signal. We place constraints on DM-muon interactions using existing data, and outline the detection reach of a dedicated re-analysis. In addition, some DM candidates alter precession primarily through a shifted precession frequency, i.e. they provide an apparent contribution to the muon magnetic dipole moment which depends on the local DM density. We find that the current muon g-2 anomaly can be explained by pseudoscalar DM which induces an oscillating electric dipole moment for the muon. This explanation may be verified with a time-resolved analysis. Note: This is a hybrid event. A zoom link will be distributed via the seminar mailing list. To join, email the organizer.
Host: Lars Aalsma
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Astronaut Scholarship Foundation presentation
Time: 5:00 pm - 6:00 pm
Place: 1003 Engineering Centers Building
Speaker: Brewster Shaw, NASA
Abstract: Astronaut Brewster Shaw will visit the University of Wisconsin to
share his experiences as a NASA astronaut and the impact of STEM
education during a lecture and scholarship presentation. UW–Madison mathematics and physics major Gage Siebert, one of the recipients of the Foundation's awards, will be recognized as well. This event
is open to the public.
Host: Tim Jensen, Engineering Physics
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