Top squark searches using dilepton invariant mass distributions and bino-Higgsino dark matter at the LHC Academic Article uri icon

abstract

  • Pair production of light top squarks at the 8-TeV LHC can be used to probe the gaugino-Higgsino sector of the minimal supersymmetric standard model. The case where the lightest neutralino is a mixture of bino and Higgsino, satisfying the thermal dark matter relic density, is investigated. In such a scenario, the lightest top squark decays mostly into (i) a top quark plus the second or third lightest neutralino, and (ii) a bottom quark plus the lightest chargino, instead of a decay scenario of the lightest top squark into a top quark and the lightest neutralino. Final states with ≥2 jets, dileptons, and missing energy are expected in a subsequent decay of the second or third lightest neutralinos into the lightest neutralino via an intermediate slepton ("light sleptons" case) or Z boson ("heavy sleptons" case). The opposite-sign same flavor dilepton mass distribution after subtracting the opposite-sign different flavor distribution shows a clear edge in the case of light sleptons. The significance for discovering such a scenario is calculated with optimized cuts in both light and heavy sleptons cases. © 2013 American Physical Society.

published proceedings

  • Physical Review D

altmetric score

  • 0.25

author list (cited authors)

  • Dutta, B., Kamon, T., Kolev, N., Sinha, K., Wang, K., & Wu, S

citation count

  • 20

complete list of authors

  • Dutta, Bhaskar||Kamon, Teruki||Kolev, Nikolay||Sinha, Kuver||Wang, Kechen||Wu, Sean

publication date

  • May 2013