"Stellar Particle Physics," by Alexander Friedland (LANL)

Tuesday, April 9, 2013 - 4:00pm to 5:00pm
Joint TEP/EEP Seminars

Joint TEP/EEP Seminar

Tuesday, April 9, 2013
4-5 PM
Physics & Astronomy Building (PAB) Room 4-330

Guest Speaker: Alexander Friedland (LANL)

Talk Title: Stellar Particle Physics


For a particle physicist, stellar interiors represent extremely hermetic detectors, sensitive to very rare processes. For example, it is well known that neutrino emission, despite the weakness of the relevant interaction (in fact, because of it!), dominates the advanced stages of stellar evolution. The same argument extends to new physics scenarios with light, weakly interacting particles, of which the axion is a prime example. But how does one know what type of stars to look at? As will be shown in the talk, the answer to this question is less than trivial. In particular, massive stars, previously thought to be useless for particle  physics, turn out to be the most sensitive known probes of the axion-photon coupling. I will also mention what massive stars can tell us about the neutrino magnetic moments.