Theory Seminar (High Energy/Cosmology)

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Muon g-2 Experiments as Dark Matter Detectors
Date: Tuesday, October 26th
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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