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SUMMARY:Stop searches with boosted tops and transverse variables.
DTSTART;VALUE=DATE-TIME:20140626T151000Z
DTEND;VALUE=DATE-TIME:20140626T153000Z
DTSTAMP;VALUE=DATE-TIME:20260615T221910Z
UID:indico-contribution-194@cern.ch
DESCRIPTION:Speakers: Dr. SENGUPTA\, Dipan (LPSC\,Grenoble)\nThe ATLAS and
  CMS experiments at the CERN LHC have collected about 20 fb−1 of data ea
 ch at the end of their 8 TeV run\, and ruled out a huge swath of parameter
  space in the context of Minimally Supersymmetric Standard Model(MSSM). Li
 mits on masses of the gluino (g~) and the squarks of the first two generat
 ions(q~) have been pushed to the TeV range. Light third generation squarks
  namely stop and sbottom of sub-TeV masses\, on the other hand\, are still
  allowed by their direct search limits. Interestingly\, the discovery of a
  Standard Model(SM) higgs boson like particle with a mass of ∼ 125 GeV f
 avours a light third generation which is also motivated by naturalness arg
 uments. Decays of stop and sbottom quarks can in general produce a number 
 of distinct final states which necessitate different search strategies in 
 the collider experiments. In this work we\, on the other hand\, propose a 
 general search strategy to look for third generation squarks in the final 
 state which contains a top quark in the sample along with two additional h
 ard leptons and substantial missing transverse momentum. We illustrate tha
 t a search strategy using the dileptonic MT2\, the effective mass meff and
  jet substructure to reconstruct the hadronic top quark can be very effect
 ive to reduce the SM backgrounds. With the proposed search strategy\, we e
 stimate that the third generation squarks with masses up to about 800 GeV 
 can be probed at the 14 TeV LHC with a 100 fb−1 data set. We also interp
 ret our results in two simplified scenarios where we consider the stop (sb
 ottom) pair production followed by their subsequent decay to a top quark a
 nd the second lightest neutralino (lightest chargino). In this case also w
 e find that stop (sbottom) mass up to 1 TeV (0.9 TeV) can be discovered at
  the 14 TeV LHC with 100 fb−1 integrated luminosity.\n\nhttp://indico.fu
 w.edu.pl/contributionDisplay.py?contribId=194&sessionId=53&confId=0
LOCATION:Old Library\, University of Warsaw 207
URL:http://indico.fuw.edu.pl/contributionDisplay.py?contribId=194&sessionI
 d=53&confId=0
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