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T: Fachverband Teilchenphysik
T 46: Supersymmetrie 2
T 46.3: Vortrag
Dienstag, 10. März 2009, 17:15–17:30, Audimax
Searching supersymmetry in µ-Jet-MET final states with CMS — •Holger Pieta, Daniel Teyssier, Arnd Meyer, and Thomas Hebbeker — III. Physikalisches Institut A, RWTH Aachen
Event signatures with leptons, high transverse momentum jets and missing transverse energy (MET) are expected in many supersymmetry models with conserved R-parity. Cascade decays of heavy supersymmetric particles generate a number of leptons and high momentum jets. At the end of these decay chains, the lightest supersymmetric particle escapes the detector unseen, resulting in large amount of missing energy.
The general purpose detector CMS is well suited to detect such events, modelled in minimal Supergravity (mSUGRA) with R-parity conservation.
The relatively high cross section and the clear signature will make it possible to detect low mass mSUGRA in early runs, with an integrated luminosity of 100 to 1000 pb−1. The high energy and high luminosity of the LHC will increase the reach in the mSUGRA parameter space far beyond LEP and Tevatron.
We evaluate the use of a multivariate analysis technique, namely Boosted-Decision-Trees (BDTs), to select SUSY events in contrast to Standard Model background events. The performance of BDTs compared to optimized one-dimensional cuts is evaluated for some points in the mSUGRA parameter space (so called “Benchmark Points“).