Search for Compressed Mass Spectrum SUSY via Electroweak VBF in Single Lepton Final States Using LHC Run II Data Collected with CMS Detector at ${\sqrt{\mathrm s}} = 13$ TeV

A background estimation methodology for the search of supersymmetric electroweakinos ($\widetilde{\chi }_{1}^{\pm }$, $\widetilde{\chi }_{2}^{0}$) produced in the vector boson fusion (VBF) topology in proton-proton collisions at ${\sqrt{\mathrm s}} = 13$ TeV using the full Run II data collected by the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC) is presented. The benchmark model for this search is the R-parity conserving Minimal Supersymmetric Standard Model (MSSM), focusing on compressed mass spectrum scenarios. The experimental signatures of the signal process involve two forward jets, large missing transverse momentum and one lepton. The dominant standard model background processes are estimated using data-driven techniques. In these proceedings, the background estimation techniques are presented, together with their validation.