Speaker
Description
Strong multi-b analysis:
A search for supersymmetry involving the pair production of gluinos decaying via third generation squarks into lightest neutralino ($\tilde\chi^0_1$) is performed. The final state contains large missing transverse momentum and several energetic jets, at least three of which must be identified as b-quarks. The analysis uses the dataset of proton-proton collisions with an integrated luminosity of 79.8 fb$^{-1}$, recorded with ATLAS at $\sqrt{s} = 13$ TeV. No excess is found above the predicted background. For $\tilde\chi^0_1$ masses below approximately 800 GeV, gluino masses of less than 2.2 TeV are excluded at 95% confidence level.
Electroweak multi-b analysis:
This analysis searches for supersymmetric partners of Higgs boson (higgsinos $\tilde{H}$) in gauge-mediated scenarios. Each higgsino is assumed to decay to a Higgs boson and gravitino. Different Higgs reconstruction methods have been tested to provide higher signal gain. LHC $pp$ collision data at a center-of-mass energy $\sqrt{s}=$ 13 TeV, with an integrated luminosity of 36.1 fb$^{-1}$ collected with ATLAS detector in 2015 and 2016 is used as an input. Limits on the cross-section are set as a function of the mass of the $\tilde{H}$ in simplified model assuming higgsinos decaying to a Higgs boson and a gravitino.
