  The LHC searches for light compressed stop squarks have resulted in
considerable bounds in the case where the stop decays to a neutralino and a
charm quark. However, in the case where the stop decays to a neutralino, a
bottom quark and two fermions via an off-shell W-boson, there is currently a
significant unconstrained region in the stop-neutralino mass plane, still
allowing for stop masses in the range 90-140 GeV. In this paper we propose a
new monojet-like search for light stops, optimized for the four-body decay
mode, in which at least one $b$-tagged jet is required. We show that, already
by using the existing 8 TeV LHC data set, such a search would cover the entire
unconstrained region. Moreover, in the process of validating our tools against
an ATLAS monojet search, we show that the existing limit can be extended to
exclude also stop masses below 100 GeV.

High Energy Physics - Phenomenology;High Energy Physics - Experiment