Search for R-parity violating supersymmetry with displaced vertices in proton-proton collisions at sqrt(s)=8 TeV

Results are reported from a search for $R$-parity violating supersymmetry in proton-proton collision events collected by the CMS experiment at a center-of-mass energy of $\sqrt{s}=8$~TeV. The data sample corresponds to an integrated luminosity of 17.6~fb${}^{-1}$. This search assumes a minimal flavor violating model where the lightest supersymmetric particle is a long-lived neutralino or gluino, leading to a signal with jets emanating from displaced vertices. In a sample of events with two displaced vertices, no excess yield above the expectation from standard model processes is observed, and limits are placed on the pair production cross section as a function of mass and lifetime of the neutralino or gluino. For a mass of 400~GeV and mean proper decay length of 10~mm, the analysis excludes cross sections above 0.6~fb at 95\% confidence level. The results are also applicable to other models in which long-lived particles decay into multijet final states.