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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2817
DTSTART:20121011T193000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T021735Z
LAST-MODIFIED:20121008T213120Z
LOCATION:4274 Chamberlin 
SUMMARY:Searches for Lorentz Violation in the Top Quark Sector\, NPAC 
 (Nuclear/Particle/Astro/Cosmo) Forum\, Denver Whittington\, Indiana Un
 iversity
DESCRIPTION:Lorentz symmetry posits that the laws of physics are invar
 iant regardless of the orientation and velocity of the reference frame
  in which they are measured. Violation of this symmetry can be quantif
 ied using the Standard-Model Extension (SME) framework\, which predict
 s the effects that Lorentz violation would have on elementary particle
 s and their interactions. This model predicts a dependence of the prod
 uction cross section for top and antitop quark pairs on sidereal time 
 as the orientation of the experiment changes with the rotation of the 
 Earth. In this talk I will present the results of a search for Lorentz
  violation in ttI\,\, events using data collected with the D0 detector
  at the Fermilab Tevatron Collider\, setting upper limits on parameter
 s within the SME describing the possible strength of Lorentz violation
  in the top sector. I will also investigate the prospects for extendin
 g this analysis using the ATLAS detector at the Large Hadron Collider 
 which\, because of the higher rate of top-antitop events at that exper
 iment\, has the potential to improve the limits determined at D0.
URL:https://www.physics.wisc.edu/events/?id=2817
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