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 √s=13 TeV pp collisions with the ATLAS detector
T. Yamazaki*  on behalf of the ATLAS Collaboration
*: corresponding author
Full text: pdf
Pre-published on: January 26, 2018
Published on: March 20, 2018
Abstract
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 √s = 13 TeV corresponding to an integrated luminosity of 36 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.
DOI: https://doi.org/10.22323/1.314.0727
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