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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3029
DTSTART:20130913T190000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T211925Z
LAST-MODIFIED:20130906T180308Z
LOCATION:5280 Chamberlin Hall
SUMMARY:A simple\, yet subtle\, invariance of the two body decay\, The
 ory Seminar (High Energy/Cosmology)\, Roberto Franceschini\, Universit
 y of Maryland
DESCRIPTION:In this talk I shall review common issues in the reconstru
 ction of Lorentz invariants of the two body decay\, in particular the 
 problems that arise when the boost connecting the rest frame of the de
 caying particle and the observer (laboratory) frame is not known.<br>

 \nI shall discuss how certain Lorentz _variant_ quantities such as the
  Energy of one of the decay product encodes Lorentz _invariant_ quanti
 ties of the decay in a simple and measurable way. I will describe a me
 thod to access these invariants that allow to determine the mass of th
 e decaying particle by observing only one of the two decay products. N
 ot requiring the observation of both decay products\, the described me
 thod can be applied when traditional quantities as the invariant mass 
 cannot be used. I shall show concrete results about mass measurements 
 for the leptonic decay of the top quark and supersymmetric decay chain
 s of the gluino. Possible uses of this observation to study the stabil
 ization symmetry of the Dark Matter at colliders will be discussed as 
 well.
URL:https://www.physics.wisc.edu/events/?id=3029
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