Freiburg 2008 – scientific programme

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T: Fachverband Teilchenphysik

T 15: Beyond the Standard Model (Theorie) I

T 15.5: Talk

Monday, March 3, 2008, 17:45–18:00, KGI-HS 1021

Sneutrino LSPs in R-Parity violating minimal supergravity models — Markus Bernhardt, Siba Das, Herbi Dreiner, and •Sebastian Grab — Physikalisches Institut, Bonn, Germany

We consider the minimal supergravity model (mSUGRA) with one additional R-Parity violating operator at the GUT scale. This alters the standard mSUGRA mass spectrum due to the additional R-Parity violating terms in the renormalization group equations.

We show that a lepton number violating operator at the GUT scale can lead to a sneutrino as the lightest supersymmetric particle (LSP). We investigate in detail the conditions leading to a sneutrino LSP. We take into account restrictions from precision measurements like the anomalous magnetic moment of the muon. We also give examples for collider signatures at the Tevatron and at the LHC. Resonant single sneutrino and slepton production and typical hadronic sneutrino decays will lead to characteristic event signatures at colliders.