The result of a search for the direct pair production of top squarks, the supersymmetric partner of the top-quark, in final states with one isolated electron or muon, jets, and missing transverse momentum is reported.
The search uses data from $pp$ collisions recorded at the LHC with the ATLAS detector at a centre-of-mass energy of $\sqrt{s}$ = 13 TeV corresponding to an integrated luminosity of 36 $\mathrm{fb}^{-1}$.
Dedicated analysis for the Higgsino LSP model is performed considering small mass splitting between electroweakinos and the realistic branching ratio of a top squark.
No significant excess over the Standard Model predictions is observed.
Exclusion limits at 95% confidence level in the Higgsino LSP model are set.
The top squark mass is excluded up to 810 GeV for 2 GeV mass splitting between the chargino and the lightest neutralino.
The results are also reinterpreted to set exclusion limits in a Bino-Higgsino mixed LSP model.
Volume 314 -
The European Physical Society Conference on High Energy Physics (EPS-HEP2017) -
Higgs and New Physics (Poster Session). Scientific Secretary: Luciano Canton.
Search for top squarks in final states with one isolated lepton in $\sqrt{s}$=13 TeV $pp$ collisions with the ATLAS detector
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Pre-published on:
January 26, 2018
Published on:
March 20, 2018
Abstract
DOI: https://doi.org/10.22323/1.314.0727
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.