Searching for coloured LSPs at the LHC

Assuming a coloured sparticle as the lightest supersymmetric particle (LSP), we carry out an analysis of the relevant signals expected at the LHC. The discussion is established in the framework of the μνSSM, where the presence of R-parity violating couplings involving right-handed neutrinos solves simultaneously the μ-problem and the accommodation of neutrino masses and mixing angles. The decays can be prompt or displaced, depending on the regions of the parameter space of the model. We focus the analysis on the right sbottom LSP and right/left stop LSP, paying special attention to reproduce the current experimental data on neutrino and Higgs physics, as well as flavour observables. For displaced (prompt) decays, our results translate into lower limits on the mass of the right sbottom LSP of about 1041 GeV (1070 GeV). The largest possible value found for the decay length is about 3.5 mm. Regarding the stop LSP, our results translate into a lower limit on the mass of the left (right) stop LSP of 1068 GeV (1341 GeV), corresponding to a decay length of 1.86 mm (6.61 mm).

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