  The lack of observation of superpartners at the Large Hadron Collider so far
has led to a renewed interest in supersymmetric models with R-parity violation
(RPV). In particular, imposing the Minimal Flavor Violation (MFV) hypothesis on
a general RPV model leads to a realistic and predictive framework. Naturalness
suggests that stops and gluinos should appear at or below the TeV mass scale.
We consider a simplified model with these two particles and MFV couplings. The
model predicts a significant rate of events with same-sign dileptons and
b-jets. We re-analyze a recent CMS search in this channel and show that the
current lower bound on the gluino mass is about 800 GeV at 95% confidence
level, with only a weak dependence on the stop mass as long as the gluino can
decay to an on-shell top-stop pair. We also discuss how this search can be
further optimized for the RPV/MFV scenario, using the fact that MFV stop decays
often result in jets with large invariant mass. With the proposed improvements,
we estimate that gluino masses of up to about 1.4 TeV can be probed at the 14
TeV LHC with a 100 fb^-1 data set.
