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Multi Jets Estimation For SUSY Search With MT2

Ghasemi Bostan Abad, Meisam | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45585 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Arfaei, Hessamadin; Paktinat Mehdi Abadi, Saeid
  7. Abstract:
  8. In chapter one, I introduce large hadron colider and it's detectors CMS and ATLAS. Then I reviewe the structure of CMS such as tracker,ECAL,HCAL and Muon chamber.
    In chapter two and three standard model (SM) and supersymmetry (SUSY) were introduced as a beneficial theory of particle physics. Spontaneous symmetry breaking was applied on MSSM lagrangians (Minimal Supersymmetric Standard Model) and all supersymmetric particles gain masses.
    In the last chapter I explain MT2 variable and it’s application in jets recognition. After applying all cuts I use MT2 analysis and compare distribution of all channels (QCD,Wjets,Zjets,Top) with real data. At last i use ABCD method for estimating QCD background at signal region.
  9. Keywords:
  10. Supersymmetry ; Standard Model ; Cross Section Broadening ; Missing Energy

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