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SUMMARY:Global anomalies in the Standard Model(s) and Beyond
DTSTART:20200323T140000
DTEND:20200323T153000
DTSTAMP:20260404T062815Z
UID:edc35ae6e139083e4301c59437d174b14740dd57c2e901ef4eea0fd1
CATEGORIES:Conferences - Seminars
DESCRIPTION:Joe Davighi (Cambridge)\nGlobal anomalies in gauge theories ar
 e detected by the exponentiated eta-invariant\, which becomes a cobordism 
 invariant when perturbative anomalies vanish. We analyse global anomalies 
 in four distinct (but equally valid) versions of the SM by computing the a
 ppropriate cobordism groups using the Atiyah-Hirzebruch spectral sequence.
  In two cases we find that there are no global anomalies beyond the Witten
  anomaly associated with the SU(2) factor\, while in the other cases we sh
 ow that there are no global anomalies at all\, uncovering a subtle interpl
 ay between local and global anomalies. If there is time\, we shall also co
 mment on the (lack of) global anomalies in various Beyond the Standard Mod
 el (BSM) theories\, such as Z prime\, Pati-Salam\, and trinification model
 s.
LOCATION:BSP 727 https://plan.epfl.ch/?room==BSP%20727
STATUS:CANCELLED
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