R-parity violation: Hide & Seek

Abstract

We point out that, if R-parity is broken spontaneously, the neutralino can decay to the final state majoron plus neutrino, which from the experimental point of view is indistinguishable from the standard missing momentum signal of supersymmetry. We identify the regions of parameter space where this decay mode is dominant and show that they are independent of R-parity conserving SUSY parameters. Thus, (a) only very weak limits on R-parity violating couplings can be derived from the observation of missing momentum events and (b) at future collider experiments huge statistics might be necessary to establish that R-parity indeed is broken. Parameter combinations which give calculated relic neutralino density larger than the measured dark matter density in case of conserved R-parity are valid points in this scenario and their phenomenology at the LHC deserves to be studied.

8 pages, 2 figures; ref. added; matches published version (title changed in the published version)

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Cited by in corpus (8)

• The Hunt for New Physics at the Large Hadron Collider
• Collider aspects of flavour physics at high Q
• Majoron emission in muon and tau decays revisited
• Spontaneous R-parity violation: Lightest neutralino decays and neutrino mixing angles at future colliders
• Probing neutralino properties in minimal supergravity with bilinear R-parity violation
• Status of R-parity violating SUSY
• LHC phenomenology of supersymmetric models beyond the MSSM
• Spontaneous R-parity violation and the origin of neutrino mass