Dresden 2013 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 53: Supersymmetrie 4
T 53.7: Vortrag
Mittwoch, 6. März 2013, 18:15–18:30, GER-038
Supersymmetric models with leptonic R-parity violation for new physics searches with the ATLAS detector — •Michael Flowerdew, Federico Sforza, Maximilian Goblirsch-Kolb, Dominik Krauss, and Hubert Kroha — Max-Planck-Institut für Physik, München
Supersymmetry is one of the most popular and well-motivated extensions to the Standard Model. If TeV-scale sparticles exist, they should be produced copiously in proton-proton collisions at the Large Hadron Collider. However, to date, none have been observed. One explanation of this could be that R-parity, usually assumed to be conserved, is broken. R-parity conservation implies that the lightest supersymmetric particle (LSP) is stable, while its violation allows it to decay, with dramatic consequences for the expected experimental signatures of these events.
In this talk, we describe models used by the ATLAS experiment with leptonic R-parity violation. This is described by a term λijk Li Lj E_k added to the usual minimal supersymmetric superpotential. This results typically in a very high lepton multiplicity in the final state, for example from the decay χ10→ℓ+ℓ′ −ν. Recent ATLAS searches for anomalous events with four or more electrons or muons have tested these models. The phenomenology and challenges of these final states will be discussed, and possible future search strategies discussed.