Reminder - High Energy Physics Seminar TOMORROW (Mouland)

[HECAP - Margherita Di Giovannantonio]

*_HIGH ENERGY PHYSICS SEMINARS_**__*

*Thursday, 18 April* 2024, at *16:00*  - *LUIGI STASI SEMINAR ROOM - 
https://indico.ictp.it/event/10687//<https://indico.ictp.it/event/10687/> 
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Mouland Rishi (University of Cambridge)

*“Fermion-Monopole Scattering in the Standard Model”*

_Abstract_

It’s been known since the work of Callan and Rubakov that a generic 
gauge theory harbours a riddle: the scattering of light fermions off 
heavy monopoles necessitates exotic outgoing states with fractional 
occupation numbers. I will first explain how we can finally make sense 
of these outgoing states in the modern language of generalised 
symmetries: They arise as states in a twisted Hilbert space, which is 
generated by operators at the edge of a topological surface. I will then 
apply this general formalism to the original case of interest, the 
Standard Model itself, which exhibits a number of new features. I will 
finally discuss various other scenarios, including some that require 
non-invertible symmetry defects.



This is a hybrid event. *To join via Zoom*:

  Zoom link: https://zoom.us/j/93124307428


Meeting ID: 931 2430 7428

Password: 691466