  The first search for supersymmetry in the vector-boson fusion topology is
presented. The search targets final states with at least two leptons, large
missing transverse momentum, and two jets with a large separation in rapidity.
The data sample corresponds to an integrated luminosity of 19.7 inverse
femtobarns of proton-proton collisions at sqrt(s) = 8 TeV collected with the
CMS detector at the CERN LHC. The observed dijet invariant mass spectrum is
found to be consistent with the expected standard model prediction. Upper
limits are set on the cross sections for chargino and neutralino production
with two associated jets, assuming the supersymmetric partner of the tau lepton
to be the lightest slepton and the lightest slepton to be lighter than the
charginos. For a so-called compressed-mass-spectrum scenario in which the mass
difference between the lightest supersymmetric particle and the next lightest,
mass-degenerate, gaugino particles is 50 GeV, a mass lower limit of 170 GeV is
set for these latter two particles.
