TPPC weekly seminar (in-person): Archil Kobakhidze - Topology of vacua and new particle states within the Standard Model and General Relativity
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Europe/London
Description
Abstract:
I will argue that in theories with a θ-vacuum structure and spectral asymmetry of ground state fermions, the anomalous symmetry is necessarily realized non-linearly.
Applying this to General Relativity, we conclude that: (i) General Relativity 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.
