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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-8529
DTSTART:20231213T203000Z
DTEND:20231213T223000Z
DTSTAMP:20260414T025137Z
LAST-MODIFIED:20231213T141233Z
LOCATION:4272 Chamberlin
SUMMARY:A Search for Vector-Like Leptons (VLLs)\, Preliminary Exam\, E
 lise Chavez\, Physics PhD Graduate Student
DESCRIPTION:The Standard Model is the current theoretical description 
 of fundamental particles and their interactions. While it is able to d
 escribe the majority of phenomena that we observe\, there are many tha
 t it cannot accommodate for. Such phenomena are dark matter\, dark ene
 rgy\, and lepton non-universality. New theories have been proposed tha
 t extend the Standard Model in order to answer these long standing que
 stions. One such extension is the 4321 model that predicts several new
  particles\, one of which is the vector-like lepton (VLL). A search fo
 r pair produced vector-like leptons (VLLs) is proposed using the Run I
 I data that was produced by proton-proton collisions at sqrt(s) = 13 T
 eV and collected by the Compact Muon Solenoid (CMS) at the Large Hadro
 n Collider (LHC). In this search\, the modes where the decays of the V
 LLs result in two Standard Model leptons are examined. This search emp
 loys a set of optimized kinematic selection criteria to enhance the si
 gnal\, with respect to the Standard Model background\, and a data base
 d approach to determine the dominant ttbar background process. The goa
 l of this search is to determine whether we see an excess of events in
  our data and set limits on the cross section of the VLL pair producti
 on.
URL:https://www.physics.wisc.edu/events/?id=8529
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