Theory Seminar (High Energy/Cosmology) |
Events During the Week of September 11th through September 18th, 2016
Monday, September 12th, 2016
- No events scheduled
Tuesday, September 13th, 2016
- Baryogenesis from Decaying Magnetic Helicity
- Time: 3:30 pm
- Place: 5280 Chamberlin
- Speaker: Andrew Long, University of Chicago, Kavli Institute for Cosmological Physics (KICP)
- Abstract: Due to quantum anomalies in the Standard Model, baryon number is violated in the early universe in the presence of a helical (hyper)magnetic field. I will discuss how the matter / anti-matter asymmetry of the universe may have been created from the decaying helicity of a primordial (hyper)magnetic field. This scenario has the interesting feature that baryogenesis occurs without the violation of (B-L), since the (B+L) asymmetry generated by the hypermagnetic field counteracts the washout by electroweak sphalerons. After the electroweak crossover, the hypermagnetic field becomes an electromagnetic field. Thus, observations of the relic, intergalactic magnetic field today may inform our understanding of the cosmological excess of matter over anti-matter.
- Host: Joshua Berger
Wednesday, September 14th, 2016
- No events scheduled
Thursday, September 15th, 2016
- No events scheduled
Friday, September 16th, 2016
- No events scheduled