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Non-invertible symmetries, leptons, quarks, and why multiple generations

October 11, 2023 @ 4:30 pm - 6:00 pm

Quantum Matter Seminar

Speaker: Seth Koren (Notre Dame)

Title: Non-invertible symmetries, leptons, quarks, and why multiple generations

Abstract: Generalized global symmetries are present in theories of particle physics, and understanding their structure can give insight into these theories and UV completions thereof.  After discussing the generalized symmetries of the Standard Model, we will go Beyond and show that the identification of a non-invertible symmetry of Z’ models of L_µ – L_τ reveals the existence of non-Abelian horizontal gauge theories which naturally produce exponentially small Dirac neutrino masses. Next we will uncover a subtler non-invertible symmetry in horizontal gauge theories of the quark sector which will lead us to a massless down-type quarks solution to strong CP in color-flavor unification. Intriguingly, this theory works by virtue of the SM having the same numbers of colors and generations.


October 11, 2023
4:30 pm - 6:00 pm
Event Category:


Juven Wang


CMSA Room G10
CMSA, 20 Garden Street
Cambridge, MA 02138 United States
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