Neutralino Phenomenology at LEP2 in Supersymmetry with Bilinear Breaking of R-parity

Abstract

We discuss the phenomenology of the lightest neutralino in models where an effective bilinear term in the superpotential parametrizes the explicit breaking of R-parity. We consider supergravity scenarios where the lightest supersymmetric particle (LSP) is the lightest neutralino and which can be explored at LEP2. We present a detailed study of the LSP decay properties and general features of the corresponding signals expected at LEP2. We also contrast our model with gauge mediated supersymmetry breaking.

21 pages, Latex, uses axodraw.sty (included), 13 figures included as ps- and eps-files, figures slightly changed after bug-fixing, comparison with GMSB and a few references added, version to appear in NPB

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• Broken R-parity, stop decays, and neutrino physics
• Probing neutrino mass with displaced vertices at the Tevatron
• Sneutrino as Lightest Supersymmetric Particle in B3 mSUGRA Models and Signals at the LHC
• Probing neutrino mass with multilepton production at the Tevatron in the simplest R-parity violation model
• The decays gluino -> stop_1 b-quark W and gluino -> stop_1 c-quark and phenomenological implications in supersymmetric theories
• Addressing μ-b_μand proton lifetime problems and active neutrino masses in a U(1)^\prime-extended supergravity model
• Spontaneous R-parity violating type III seesaw
• Standard and non-standard neutrino properties