R-parity violation: Hide & Seek

Details R-parity violation: Hide & Seek R-parity violation: Hide & Seek

2006-06-06

arxiv.org/abs/hep-ph/0606061v3

Phys.Rev. D74 (2006) 055003

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1103/PhysRevD.74.055003

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.

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