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R-Paritäts-verletzende Produktion und Zerfall von Selektronen in Ereignissen mit zwei Elektronen und zwei Jets bei $\sqrt{s}$ = 8 TeV
Presented is the analysis for R parity violating production and decay of a selectron into a final state with two same-sign electrons and two jets. CMS data with √s = 8 TeV and L = 19.7 fb−1 is used. The theoretical basis of this analysis is the cMSSM where the commonly used R parity conservation is...
Autor principal: | |
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Lenguaje: | german |
Publicado: |
2017
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Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2286459 |
Sumario: | Presented is the analysis for R parity violating production and decay of a selectron into a
final state with two same-sign electrons and two jets. CMS data with √s = 8 TeV and L =
19.7 fb−1 is used. The theoretical basis of this analysis is the cMSSM where the commonly used
R parity conservation is replaced by the baryon triality conversation. This allows new lepton
number violating coupling constants λ′ijk, so that the resonant production of a selectron is
possible via λ′111. The existing limits on λ′111 are set by experimental searches for neutrinoless
double-beta decay. Using CMS data this limits can be improved. Up to now there are no
results from collider experiments according to this production and decay.
This analysis applies a set of selections to separate the signal from background processes.
Therefor existing selection criteria are used to select well reconstructed particles. Thereupon
cut values for the transverse momenta of the electrons and the missing transverse energy are
investigated. By optimising the expected cross section limit, new cut values for these three
quantities are proposed. Finally the expected limits on the coupling λ′111 are improved for
various parameter points by approximately one order of magnitude. |
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