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SUMMARY:Global Structure\, Non-Invertible PQ Symmetry\, and the DFSZ Domai
 n Wall Problem
DTSTART:20261112T000000Z
DTEND:20261112T010000Z
DTSTAMP:20261113T132600Z
UID:indico-event-19128@indico.global
DESCRIPTION:Speakers: Sungwoo Hong\n\nIn this talk\, I will introduce the 
 notion of global aspects in the physics of particles and topological defec
 ts by taking a concrete example of DFSZ axion model. In particular\, I wi
 ll describe how various global structures play important roles in the doma
 in wall problem of the DFSZ axion model. A precise identification of the a
 xion string–domain wall network—and hence the true nature of the domai
 n wall problem—becomes possible by recognizing a discrete overlap betwee
 n the Peccei-Quinn symmetry and the SM gauge group.\nAn elegant solution t
 o the domain wall problem can also be realized by introducing another glob
 al structure shared between the color and family gauge groups\, which give
 s rise to discrete non-invertible Peccei-Quinn symmetries. This discrete n
 on-invertible symmetry can then be slightly broken by small instanton effe
 cts in a UV completion in the form of an SU(9) color–flavor unification.
  In this part of talk\, if time is permitted\, I will discuss construction
  of non-invertible symmetry defect operator and its action on both local a
 nd line operators in the language of "partial gauging".\n\nhttps://indico.
 global/event/19128/
URL:https://indico.global/event/19128/
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