B-tagging optimisation studies in SUSY events with photons and missing energy at CMS
- Author: Simon Bohlen
- Date: Oct 2013
- Thesis Type: Bachelor
In this thesis studies are presented, which aim to improve the search of supersymmetric final states containing photons, jets and missing transverse energy. Simulated events of the CMS detector of proton-proton collisions at the LHC with a center-of-mass energy
$\sqrt{s} = 8$ TeV are used. The main idea is to improve the ratio of signal events over of background events by implementing b-tagging into the analysis. Monte-Carlo simulations are used to do general studies like b-tag efficiency and fake rate measurements as well as analyzing the change of the ratios of signal events to background events when requiring b-tags or applying a veto for b-tags. The studies have shown, that the requirement of a b-tag improves the ratio of the number of signal events to the number of background events for all studied signal samples by a factor of up to 3.5 if missing transverse energies of more than 200 GeV are required.
Research Activities: Particle Physics, CMS Data Analysis, SUSY, Search for New Physics Phenomena