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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-2631
DTSTART:20120323T190000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T062338Z
LAST-MODIFIED:20120321T194428Z
LOCATION:5280 Chamberlin Hall
SUMMARY:Confronting Top AFB with Parity Violation Constraints\, Theory
  Seminar (High Energy/Cosmology)\, Ian-Woo Kim\, University of Michiga
 n
DESCRIPTION:We consider the implications of low-energy precision tests
  of parity violation on t-channel mediator models explaining the top A
 FB excess measured by CDF and D0. Flavor-violating u-t or d-t coupling
 s of new scalar or vector mediators generate at one-loop an anomalous 
 contribution to the nuclear weak charge. As a result\, atomic parity v
 iolation constraints disfavor at >3 sigma t-channel models that give r
 ise to a greater than 20% AFB at the parton level for M_tt > 450 GeV w
 hile not producing too large a top cross-section. Even stronger constr
 aints are expected through future measurements of the proton weak char
 ge by the Q-Weak experiment.<br>
URL:https://www.physics.wisc.edu/events/?id=2631
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