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 $\geq 2$ 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).
Built on
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ATLAS Collaboration, “Search for direct top squark pair production in final states with one isolated lepton, jets, and missing transverse momentum in s = 8 \sqrt{s}=8 TeV p p pp collisions using 13 13 fb -1
2012
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ATLAS Collaboration, “Search for the charged current decay of a supersymmetric top-quark partner in final states with two leptons in s = 8 \sqrt{s}=8 TeV p p pp collisions using 13 13 fb -1
ATLAS Collaboration, “Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in 13 13 fb -1
ATLAS Collaboration, “Search for electroweak production of supersymmetric particles in final states with at least two hadronically decaying taus and missing transverse momentum with the ATLAS detector in proton-proton collisions at s = 8 \sqrt{s}=8 TeV,” ATLAS-CONF-2013-028
2013
Closest in time.
Beyond the bibliography
alphaXiv searches the wider corpus for related work and actual follow-ups.
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ATLAS Collaboration, “Search for direct production of the top squark in the all-hadronic t t ¯ + E / T t\bar{t}+{E\!\!\!\!/_{\rm T}} final state in 21 21 fb -1