Events

Events at Physics

<< Fall 2022 Spring 2023 Summer 2023 >>
Subscribe your calendar or receive email announcements of events
Network in Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) Seminar
Constraints on axion-like polarization oscillations in the CMB with POLARBEAR
Date: Tuesday, April 4th
Time: 2:00 pm - 3:00 pm
Place: Meeting ID: 912 3071 4547 NOTE: All participants and hosts are now required to sign into a Zoom account prior to joining meetings hosted by UC Berkeley.
Speaker: Jacob Spisak, UCSD
Abstract: Very light pseudoscalar fields, often referred to as axions, are compelling dark matter candidates and can potentially be detected through their coupling to the electromagnetic field. Recently a novel detection technique using the cosmic microwave background (CMB) was proposed, which relies on the fact that the axion field oscillates at a frequency equal to its mass in appropriate units, leading to a time-dependent birefringence. For appropriate oscillation periods this allows the axion field at the telescope to be detected via the induced sinusoidal oscillation of the CMB linear polarization. I will discuss how we search for this effect using the POLARBEAR telescope and the constraints we place.

Zoom Meeting
Meeting ID: 912 3071 4547
NOTE: All participants and hosts are now required to sign into a Zoom account prior to joining meetings hosted by UC Berkeley.
Host: Baha Balantekin
Add this event to your calendar