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Supersymmetric searches in the 2-electron channel

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Author

  • Ming Liang Wong

Summary, in English

The Standard Model (SM) has been very successfully used to explain many physical phenomena. However, the theory has several problems such as not being able to be unified with gravitation and the hierarchy problem. The cosmological mystery of dark matter also gives a hint that the Standard Model is not the full story and cannot explain all matter that exists in our universe. Supersymmetry (SUSY) is one of the extensions of the SM which could elegantly solve all the problems aforementioned. In this thesis, we attempt to look for $\widetilde{\chi}_2^0$ from the mSUGRA and MSSM24 theoretical frameworks using the dielectron channel by studying the invariant dielectron mass and missing transverse energy. Another technique used as a comparison is the sliding $q_T$ method which analyses the total momentum of the dielectrons. Data from the ATLAS detector using pp collisions at $\sqrt{s}=7$TeV with integrated luminosity of about 1.6 fb$^{-1}$ is used. In addition to that, several improvements to the grid job submission mechanism is shown using Python multithreading to send multiple jobs to the grid cluster thus increasing efficiency in job submission and failure management.

Publishing year

2012

Language

English

Document type

Student publication for Master's degree (two years)

Topic

  • Physics and Astronomy

Keywords

  • supersymmetry
  • ATLAS
  • grid computing

Supervisor

  • Else Lytken (biträdande lektor)