Probing compressed top squark scenarios at the LHC at 14 TeV

Bhaskar Dutta, Will Flanagan, Alfredo Gurrola, Will Johns, Teruki Kamon, Paul Sheldon, Kuver Sinha, Kechen Wang, and Sean Wu
Phys. Rev. D 90, 095022 – Published 21 November 2014

Abstract

A feasibility study is presented for the search of the lightest top squark (t˜) in a compressed scenario, where its mass is approximately equal to the sum of the masses of the top quark and the lightest neutralino χ˜10 and there exists no limit from the current 8 TeV data or from the 14 TeV projections. The study is performed in the final state of two b jets, one lepton, large missing transverse energy, and two energetic jets with a large separation in pseudorapidity, in opposite hemispheres, and with large dijet mass. The analysis shows that the LHC could probe compressed top-squark masses 300GeV with an integrated luminosity of 300fb1 for two- (t+χ˜10) and three-body (b+W+χ˜10) final states arising from the top-squark decay at 5σ significance with no systematic uncertainty. After including the systematics, the significance for mt˜=200GeV and ΔM=7GeV is expected to be 6(3)σ for 300fb1 luminosity with 3(5)% systematic uncertainty, while the significance becomes 4(2)σ for the same top-squark mass with ΔM=7GeV.

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  • Received 16 December 2013

DOI:https://doi.org/10.1103/PhysRevD.90.095022

© 2014 American Physical Society

Authors & Affiliations

Bhaskar Dutta1, Will Flanagan1, Alfredo Gurrola2, Will Johns2, Teruki Kamon1,3, Paul Sheldon2, Kuver Sinha4, Kechen Wang1, and Sean Wu1

  • 1Mitchell Institute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA
  • 2Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee, 37235, USA
  • 3Department of Physics, Kyungpook National University, Daegu 702-701, South Korea
  • 4Department of Physics, Syracuse University, Syracuse, New York 13244, USA

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Issue

Vol. 90, Iss. 9 — 1 November 2014

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