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SUMMARY:Phases of some 2d abelian gauge theories and symmetric mass genera
 tion
DTSTART:20260423T130000Z
DTEND:20260423T150000Z
DTSTAMP:20260503T013300Z
UID:indico-event-51906@agenda.infn.it
DESCRIPTION:Speakers: Bernardo Zan (Università di Genova)\n\nI will discu
 ss two-dimensional theories that are coupled in a chiral way to a U(1) glo
 bal symmetry\, meaning that we cannot deform the theory by adding a mass t
 erm. Does it mean that we’re bound to have gapless fermions in the IR? T
 he answer is negative: despite mass terms not being allowed\, non-perturba
 tive effects can still gap out the fermions. This is the phenomenon of sym
 metric mass generation. I will discuss a way of obtaining symmetric mass g
 eneration in some models with two Dirac fermions. As a warm up\, I will al
 so discuss a few non-chiral 2d abelian gauge theories. Then I will add som
 e 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.\
 n\nhttps://agenda.infn.it/event/51906/
URL:https://agenda.infn.it/event/51906/
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