Sneutrino or Stau as the Lightest Supersymmetric Particle in mSUGRA with R-Parity Violation and Signals at Hadron Colliders
by
S. Grab(Bonn)
→
Europe/Berlin
Description
The most widely studied supersymmetric scenario is the minimal
supersymmetric standard model (MSSM). In this model, lepton- and
baryon-number violating interactions are suppressed with the help of a
discrete symmetry, R-Parity or Proton Hexality, to keep the proton stable.
However it is sufficient to forbid only Lepton- or Baryon-number
violation. We consider minimal supergravity (mSUGRA) including an
additional R-Parity violating operator at the unification scale.
This can change the supersymmetric spectrum leading on the one hand to a
sneutrino as the lightest supersymmetric particle (LSP). On the other
hand, a wide parameter region is reopened, where the lightest stau is the
LSP. We investigate in detail the conditions leading to the sneutrino or
stau LSP scenarios. We present typical Tevatron and LHC signatures of the
two scenarios. Promising signatures are detached vertices from long-lived
staus, multi-lepton final states, high-pT jets and like sign muon events
from resonant single slepton production.
