Study of an electron-muon resonance in a R-parity violating supersymmetric model using ATLFAST-II
Author
Summary, in English
Supersymmetry (SUSY) is one of the best theoretically motivated beyond the Standard Model (BSM) scenarios, and a favored candidate to be discovered by the experiments at the Large Hadron Collider (LHC). The ATLAS collaboration has been extensively searching for SUSY signatures using 2010, 2011 and 2012 data from LHC proton-proton collisions at a center-of-mass energy of 7 TeV and recently at 8 TeV. However, so far no signs of SUSY or any other BSM physics has been found.
Monte Carlo simulation provides a way to design new physics analyses and quantify expected detector performance. The constraints on SUSY models are one of the main reasons for the production of a large number of Monte Carlo simulated samples, as there is the need to increase the analyses sensitivity to more challenging topologies. The simulation of a large number of Monte Carlo samples represents a big challenge in terms of central processing unit (CPU) time consumption and end-user waiting time. Then, it is of extreme importance to nd a fast and accurate way to simulate SUSY signal samples. The ATLAS collaboration has been developing a fast simulation package: ATLFast-II, where the above mentioned times are signicantly reduced. However, the use of ATLFast-II for signal sample production must be evaluated in a case by case basis and its use is justied only when there is no loss of accuracy in simulating physics
objects.
The current work investigates the performance of ATLFast-II in a particular R-parity violating (RPV) SUSY model predicting the existence of a heavy neutral short-lived resonance (a tau sneutrino) that decays to an electron-muon pair with opposite charges. It is the first dedicated study of the performance of ATLFast-II using a RPV SUSY model.
Monte Carlo simulation provides a way to design new physics analyses and quantify expected detector performance. The constraints on SUSY models are one of the main reasons for the production of a large number of Monte Carlo simulated samples, as there is the need to increase the analyses sensitivity to more challenging topologies. The simulation of a large number of Monte Carlo samples represents a big challenge in terms of central processing unit (CPU) time consumption and end-user waiting time. Then, it is of extreme importance to nd a fast and accurate way to simulate SUSY signal samples. The ATLAS collaboration has been developing a fast simulation package: ATLFast-II, where the above mentioned times are signicantly reduced. However, the use of ATLFast-II for signal sample production must be evaluated in a case by case basis and its use is justied only when there is no loss of accuracy in simulating physics
objects.
The current work investigates the performance of ATLFast-II in a particular R-parity violating (RPV) SUSY model predicting the existence of a heavy neutral short-lived resonance (a tau sneutrino) that decays to an electron-muon pair with opposite charges. It is the first dedicated study of the performance of ATLFast-II using a RPV SUSY model.
Publishing year
2012
Language
English
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Document type
Student publication for Master's degree (one year)
Topic
- Physics and Astronomy
Keywords
- Supersymmetry
- R-parity violation
- ATLAS Fast Simulation of the detector
- ATLFast-II
- electron-muon pair
- Particle Physics
Supervisor
- Bernhard Meirose