  We consider a light supersymmetric top quark (stop) scenario, where a stop
and a neutralino are the lightest supersymmetric particles and the stop mass is
close to the sum of the neutralino mass and the top quark mass. In this
scenario, the top quark and the neutralino coming from the decay of a stop have
almost equal velocity vectors, and hence the missing transverse momentum in
stop pair production events at colliders is suppressed, which makes the stop
search challenging, as in the degenerate scenario where the stop mass and the
neutralino mass are nearby. In this paper, we propose a novel analysis
technique aiming at discovering the stop pair production signal in such an
`equal-velocity' scenario. The key is to look for events where the missing
transverse momentum vector is proportional to the transverse momentum vector of
the top quark pair with specific values for the proportionality coefficient, as
this coefficient equals to the ratio of the neutralino mass over the top quark
mass in the equal-velocity limit. We examine the possibility that the stop
signal can be identified at the 14 TeV LHC by our analysis method.
