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Putting Generalized Symmetries to Work for Particle Physics

Date and Time: Tuesday, May 02, 2023, 02:30pm -
Location: https://rutgers.zoom.us/j/94699297301?pwd=SVJieHRUYUtmZmRCbGZKQlBTMTRPdz09
 

Speaker: Seth Koren (University of Chicago)

Abstract: Over the past decade, field theorists have developed a novel framework for thinking about global symmetries which has enormously generalized our understanding thereof. Quite recently, my collaborators and I have established positively that past being a useful formal tool, such generalized symmetries are indeed present in models that we care about as particle physicists---and furthermore understanding them can lead to new insights into these models. As a first example, the Standard Model itself has a 'higher-group' symmetry intertwining flavor and hypercharge, and I will discuss how this symmetry controls the structure of unification. Going Beyond, I will show that the identification of a 'non-invertible' symmetry of Z' models of L_µ - L_? reveals the existence of simple UV completions thereof where the scale of neutrino masses is exponentially suppressed from that of charged leptons.

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