Natural supersymmetry (SUSY) suggests light higgsinos possibly within the discovery reach of Run-2 of the LHC. This poster presents the lat- est result of a search for R-parity violating (RPV) SUSY in final states with one lepton and high jet and b-jet multiplicities. In a target model supersymmetric higgsinos are produced in pairs and decay via an RPV coupling to three quarks. The ttbar̄ process is the main background source and estimated using a data-driven model that predicts higher jet and b-jet multiplicities used in the search.
Machine learning techniques are introduced to reach sensitivity to elec- troweakino production, extending the data-driven background estimation to the shape of the machine learning discriminant. This search repre- sents the first LHC result to obtain sensitivity to electroweak production of SUSY particles promptly decaying to quarks, as predicted in baryon-number-violating RPV models.
|Collaboration / Activity||ATLAS|