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Supersymmetric searches in the 2-electron channel

Wong, Ming Liang LU (2012) FYSM60 20112
Department of Physics
Particle Physics
Abstract
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... (More)
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. (Less)
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author
Wong, Ming Liang LU
supervisor
organization
course
FYSM60 20112
year
type
H2 - Master's Degree (Two Years)
subject
keywords
supersymmetry, ATLAS, grid computing
language
English
id
2295575
date added to LUP
2012-02-21 11:28:27
date last changed
2012-11-12 22:42:36
@misc{2295575,
  abstract     = {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.},
  author       = {Wong, Ming Liang},
  keyword      = {supersymmetry,ATLAS,grid computing},
  language     = {eng},
  note         = {Student Paper},
  title        = {Supersymmetric searches in the 2-electron channel},
  year         = {2012},
}