Stop and sbottom LSP with R-parity violation

초록

Considering a third-generation squark as the lightest supersymmetric particle (LSP), we investigate R-parity violating collider signatures with bilinear LH or trilinear LQD operators that may contribute to observed neutrino masses and mixings. Reinterpreting various LHC 7 + 8 TeV results of supersymmetry and leptoquark searches, we find that third-generation squark LSPs decaying to first-or second-generation leptons are generally excluded up to at least about 660 GeV at 95% C.L. One notable feature of sbottom LSP models, as opposed to stop LSP models, is that sbottoms can decay to top quarks leading to a broader invariant mass spectrum and weaker constraints in current collider searches. More dedicated searches with b-taggings or top reconstructions are thus encouraged. Finally, we discuss that the recently observed excesses in the CMS leptoquark search can be accommodated by decays of mostly left-handed sbottom LSPs in the LQD(113+131) model.

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