REMINDER - High Energy Physics Seminars TODAY - Zan (Lagrange Lecture Hall)

[HECAP - Margherita Di Giovannantonio]

*_HIGH ENERGY PHYSICS SEMINARS_**__*

*/!!Please note unusual venue!!/*
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*Tuesday, 14 April *2026, at *16:00* - *_Lagrange Lecture 
Hall_***-*https://indico.ictp.it/event/11264/*

Bernardo ZAN (University of Genova)


*“Phases of Some 2D Abelian Gauge Theories and Symmetric Mass Generation"*
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_Abstract_

I will discuss two-dimensional theories that are coupled in a chiral way 
to a U(1) global symmetry, meaning that we cannot deform the theory by 
adding a mass term. Does it mean that we’re bound to have gapless 
fermions in the IR? The answer is negative: despite mass terms not being 
allowed, non-perturbative effects can still gap out the fermions. This 
is the phenomenon of symmetric mass generation. I will discuss a way of 
obtaining symmetric mass generation in some models with two Dirac fermions.
As a warm up, I will also discuss a few non-chiral 2d abelian gauge 
theories. Then I will add some scalar fields to our theory of interest 
and gauge some U(1)’s to show how a symmetry preserving deformation will 
eventually gap out the theory, showing therefore a clean mechanism to 
obtain symmetric mass generation.


To attend via _*Zoom*_, please *_register_* here:
https://zoom.us/meeting/register/Bpit-7vSTwKQSC8W4Dz0PA