Aug 23 – 28, 2010
Europe/Berlin timezone

Discovery potential with early LHC data for R-parity violating mSUGRA with stau-LSP

Aug 27, 2010, 2:51 PM
Kl. Hörsaal Mathematik (Bonn)

Kl. Hörsaal Mathematik


Nussallee 12


Sebastian Fleischmann (University of Bonn)


A well motivated model is R-parity violating minimal supergravity (mSUGRA). In this model, lepton number is violated and the lightest supersymmetric particle (LSP) is non-stable and can thus be charged. We investigate the discovery potential at the LHC of two benchmark scenarios of R-parity violating mSUGRA with a stau-LSP. The scenarios differ in their R-parity violating coupling and can be considered as two extreme cases of RPV mSUGRA with stau-LSP, where the LSP decays promptly. In the first scenario the LSP undergoes a four-body decay into leptons, whereas it decays into two light quarks in the second scenario. Fast detector simulations of the ATLAS experiment have been used to evaluate the discovery significance at a center of mass energy of 7TeV and an integrated luminosity of 1fb-1 taking the most important Standard Model backgrounds into account. With scans in the mSUGRA parameter space around the benchmark scenarios we show, that RPV mSUGRA can be discovered at the LHC within the first years of operation in certain parameter ranges. The possibility of the measurement of the stau mass is investigated and the special problems due to combinatorial background in one of the scenarios are highlighted. We shortly discuss the specific demands on the tau lepton identification in the signal events.

Primary author

Sebastian Fleischmann (University of Bonn)


Herbi K. Dreiner (University of Bonn) Klaus Desch (University of Bonn) Peter Wienemann (University of Bonn) Sebastian Grab (Santa Cruz Institute for Particle Physics)

Presentation materials