A search for the supersymmetric partners of the Standard Model bottom and top quarks is presented. The search uses 36.1 fb−1 of pp collision data at √s = 13 TeV collected by the ATLAS experiment at the Large Hadron Collider. Direct production of pairs of bottom and top squarks (b͂1 and t͂1) is searched for in final states with b-tagged jets and missing transverse momentum. Distinctive selections are defined with either no charged leptons (electrons or muons) in the final state, or one charged lepton. The zero-lepton selection targets models in which the b͂1 is the lightest squark and decays via b͂1 → bχ͂01, where χ͂01 is the lightest neutralino. The one-lepton final state targets models where bottom or top squarks are produced and can decay into multiple channels, b͂1 → bχ͂01 and b͂1 → tχ͂±1, or t͂1 → tχ͂01 and t͂1 → bχ͂±1, where χ͂±1 is the lightest chargino and the mass difference mχ͂±1 − mχ͂01 is set to 1 GeV. No excess above the expected Standard Model background is observed. Exclusion limits at 95% confidence level on the mass of third-generation squarks are derived in various supersymmetry-inspired simplified models.
|Original language||English (US)|
|State||Published - Aug 30 2017|
ASJC Scopus subject areas