Light Stop Searches at the LHC in Events with two b-Jets and Missing Energy

Abstract

We propose a new method to discover light top squarks (stops) in the co-annihilation region at the Large Hadron Collider (LHC). The bino-like neutralino is the lightest supersymmetric particle (LSP) and the lighter stop is the next-to-LSP. Such scenarios can be consistent with electroweak baryogenesis and also with dark matter constraints. We consider the production of two stops in association with two b-quarks, including pure QCD as well as mixed electroweak-QCD contributions. The stops decay into a charm quark and the LSP. For a higgsino-like light chargino the electroweak contributions can exceed the pure QCD prediction. We show the size of the electroweak contributions as a function of the stop mass and present the LHC discovery reach in the stop-neutralino mass plane.

12 pages, 10 figures

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Cited by in corpus (10)

• Resolving the Higgs-Gluon Coupling with Jets
• Many faces of low mass neutralino dark matter in the unconstrained MSSM, LHC data and new signals
• Stop on Top
• Spot the stop with a b-tag
• Automated third generation squark production to next-to-leading order
• Top jets as a probe of degenerate stop-NLSP LSP scenario in the framework of cMSSM
• 1-loop SQCD corrections to the decay of top-squarks to charm and neutralino in the generic MSSM
• Tagging a mono-top signature in Natural SUSY
• SUSY signals with small and large trilinear couplings at the LHC 7 TeV runs and neutralino dark matter
• Light stop squarks and b-tagging