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UID:UW-Physics-Event-7872
DTSTART:20220824T170000Z
DTEND:20220824T180000Z
DTSTAMP:20260414T071518Z
LAST-MODIFIED:20220824T131814Z
LOCATION:Chamberlin 5280
SUMMARY:Two problems for strong CP: Topological quantization and the f
 irst postulate of quantum mechanics\, Theory Seminar (High Energy/Cosm
 ology)\, Bjorn Garbrecht\, Munich Tech. U.
DESCRIPTION:In the path integral quantization of Yang-Mills theory\, i
 nteger topological sectors follow only when Euclidean time is taken to
  infinity. This implies that the spacetime volume must be taken to inf
 inity before interfering among the sectors. On the other hand\, in can
 onical quantization\, the standard theta-vacua are not properly normal
 izable without further ado. We revisit the well-known analogy with a p
 oint particle on a circle. It is sometimes argued that continuous ener
 gy bands corresponding to Bloch states exist for this problem. We show
  however that the states in these bands exhibit an inconsistent time e
 volution\, unless narrowing the energy band to just one allowed state.
  From either perspective one can understand why no CP violation is see
 n in the strong interactions.
URL:https://www.physics.wisc.edu/events/?id=7872
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