Probing mSUGRA with a Search for Chargino-Neutralino Production using Trileptons

Glatzer, Julian ; /Rutgers U., Piscataway

关键词: ELECTRONS;    FERMILAB COLLIDER DETECTOR;    LEPTONS;    MUONS;    PRODUCTION;    SENSITIVITY;    TRANSVERSE ENERGY Experiment-HEP;   

DOI  :  10.2172/938898
RP-ID  :  FERMILAB-MASTERS-2008-05
PID  :  OSTI ID: 938898
Others  :  TRN: US0806216

学科分类：物理（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

This thesis describes the CDF II 2 fb{sup -1} search for supersymmetric chargino-neutralino production in {radical}s = 1.96TeV p{bar p} collisions using the 'golden' channel with three leptons and missing transverse energy in the final state and the application of the results to obtain a limit on the parameter space of the supersymmetric model mSUGRA. Electrons and muons are reconstructed directly; isolated tracks are used as a proxy for {tau} leptons. Several analysis channels with different signal purity are defined and evaluated independently. Based on 7 observed and 6.4 expected background events this analysis was able set the first direct limits on chargino-neutralino production in mSUGRA since LEP. Based on mSUGRA phenomenology the sensitivity of this analysis is investigated; the mSUGRA parameter space is split into different phenomenology classes. Experimental results from previous searches in this channel by CDF and D0 have been presented for specific parameter values of a given model. A more model-independent approach is proposed and, by splitting the results of this analysis into channels based on {tau} content, the results of the analysis are generalized.