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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-4231
DTSTART:20161004T203000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T055940Z
LAST-MODIFIED:20161006T170654Z
LOCATION:5280 Chamberlin
SUMMARY:Flavorful UV Instantons and the Strong CP Problem\, Theory Sem
 inar (High Energy/Cosmology)\, Kiel Howe\, Fermilab
DESCRIPTION:We describe a new solution to the strong CP problem inspir
 ed by the massless up quark solution. At high energies\, QCD is embedd
 ed in a SU(3)xSU(3)xSU(3) model\, with each matter generation charged 
 under a different site. Instanton effects are unsuppressed at the scal
 e of Higgsing to the SM diagonal QCD\, and a set of anomalous U(1)_PQ 
 symmetries removes the low-energy strong CP phase. A non-zero theta pa
 rameter is generated at loop level near current bounds. Similar models
  can also lead to a heavy axion solution to the strong CP problem.
URL:https://www.physics.wisc.edu/events/?id=4231
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