1-2pm: θ-vacua and particle spectrum beyond perturbative electroweak theory and General Relativity
1-2pm: θ-vacua and particle spectrum beyond perturbative electroweak theory and General Relativity
- Event time: 12:30pm until 2:30pm
- Event date: 12th May 2025
- Speaker: Archil Kobakhidze (University of Sydney)
- Location: Higgs Centre Seminar Room, Room 4305, James Clerk Maxwell Building (JCMB) (James Clerk Maxwell Building (JCMB)) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
Event details
I will argue that in theories with a θ-vacuum structure and spectral asymmetry of the Dirac operator, the anomalous symmetry is realized non-linearly.
Applying this to General Relativity, we conclude that: (i) the Einstein’s theory requires an expanded gauge structure based on local supersymmetry; (ii) even in the simplest such theory, N=1 supergravity, supersymmetry is spontaneously broken by the gravitino condensate, leading to a (pseudo)Goldstone supermultiplet consisting of the dilaton, R-symmetry axion, and goldstino.
Similarly, the electroweak sector of the Standard Model must exhibit non-linearly realized anomalous B+L invariance, accompanied by the (pseudo)Goldstone particle, the electroweak ηw, which can be viewed as the electroweak counterpart of the QCD η meson.
About Particle Physics Theory seminars
The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..