  The purpose of this review is to investigate what kind of physics can be
extracted at the LHC, assuming a discovery is made in events with missing
transverse momentum, as generically expected in supersymmetry (SUSY) with
R-parity conservation. To set the scene, we first discuss the collider
phenomenology of the six possible electroweakino benchmark scenarios, as they
provide valuable insight into what one might be facing at the LHC. We review
the existing methods for mass reconstruction from measured kinematic endpoints
in the distributions of suitable variables, e.g., the invariant masses of
various sets of visible decay products, as well as the $M_{T2}$ and the $M_2$
types of variables. We propose to extend the application of these methods to
the various topologies of fully hadronic final states, possibly with
hadronically reconstructed massive bosons (W, Z or h). We test the idea with a
simplified simulation of events in the main electroweakino benchmark scenarios.
We find that the fully hadronic events allow the complete determination of the
relevant mass spectrum. For comparison, we also review the potential of the
standard kinematic endpoint methods for final states involving leptons from the
decays of (on-shell or off-shell) sleptons. We find that with 300 $fb^{-1}$,
the statistics for the leptonic events is very marginal and they look less
promising than the fully hadronic channels. This corresponds to a complete
reversal of the usual paradigm, where leptonic events comprised the gold-plated
SUSY channels. Finally, we put together all available information and summarize
what level of understanding of the underlying physics can be achieved. We show
that, as a by-product of the mass reconstruction, it is also possible to
determine the production cross sections and decay branching ratios, which in
turn enable us to pinpoint the underlying model.
