Search for Supersymmetry in the single and zero lepton final states via vector boson fusion at 13~TeV

Various searches for supersymmetry are actively carried out by both CMS and ATLAS experiments. While some searches focused on the production of colored supersymmetric particles, as their production cross sections are higher at the LHC, some others focused on weakly produced chargino/neutralinos or sleptons. However, there is yet no supersymmetric particle detected by these searches. Searches have put limits on the masses of gluinos and squarks of first and second generations and their masses were excluded below about 2 TeV. On the contrary, limits on the masses of weakly produced charginos, neutralinos, and sleptons are less constrained as these particles have smaller production cross sections at the LHC. Those limits are for non-compressed mass spectra supersymmetry. A search for supersymmetry in the final states with one/zero lepton along with missing energy and two jets in vector boson fusion topology is presented. The data sample collected by the CMS detector in proton-proton collisions at a center-of-mass energy of 13 TeV corresponds to an integrated luminosity of 35.9 fb$^{-1}$. Two scenarios are considered in this search. The first one is a light slepton scenario in which the branching fraction of chargino/neutralino to slepton is 100\%, and the other one is the virtual W/Z scenario where sleptons are too heavy to be produced thus chargino and neutralino decays proceed via virtual W and Z bosons. Background estimation is carried out using data-driven methods. The observed di-jet invariant mass and transverse mass distributions do not reveal anything beyond standard model predictions. For a compressed mass spectrum scenario where the mass difference between the chargino/neutralino and slepton is 1 (30) GeV, the most stringent lower limit to date of 112 (215) GeV is set on the mass of these latter two particles.