BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Global Structure\, Non-Invertible PQ Symmetry\, and the DFSZ Domai
 n Wall Problem
DTSTART:20260507T070000Z
DTEND:20260507T083000Z
DTSTAMP:20260511T172800Z
UID:indico-event-403@indico.kias.re.kr
DESCRIPTION:Speakers: Sungwoo Hong (KAIST)\n\nTitle: Global Structure\, N
 on-Invertible PQ Symmetry\, and the DFSZ Domain Wall Problem\nSpeaker: Sun
 gwoo Hong\nAbstract: \nIn this talk\, I will introduce the notion of glob
 al aspects in the physics of particles and topological defects by taking a
  concrete example of DFSZ axion model. In particular\, I will describe ho
 w various global structures play important roles in the domain wall proble
 m of the DFSZ axion model. A precise identification of the axion string–
 domain wall network—and hence the true nature of the domain wall problem
 —becomes possible by recognizing a discrete overlap between the Peccei-Q
 uinn symmetry and the SM gauge group.\nAn elegant solution to the domain w
 all problem can also be realized by introducing another global structure s
 hared between the color and family gauge groups\, which gives rise to disc
 rete non-invertible Peccei-Quinn symmetries. This discrete non-invertible 
 symmetry can then be slightly broken by small instanton effects in a UV co
 mpletion 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-invert
 ible symmetry defect operator and its action on both local and line operat
 ors in the language of "partial gauging".\n\nhttps://indico.kias.re.kr/eve
 nt/403/
LOCATION:Room 1423 (KIAS)
URL:https://indico.kias.re.kr/event/403/
END:VEVENT
END:VCALENDAR