  This dissertation focuses on phenomenological studies for possible signals
for supersymmetric events at the Large Hadron Collider (LHC). We have divided
our endeavours into three separate projects. First, we consider SUSY models
where the gluino production at the LHC should be rich in top and bottom quark
jets. Requiring $b$-jets in addition to missing energy $\eslt$ should,
therefore, enhance the supersymmetry signal relative to Standard Model
backgrounds. We quantify the increase in the supersymmetry reach of the LHC
from $b$-tagging in a variety of well-motivated models of supersymmetry. We
also explore $top$-tagging at the LHC. Second, we explore the prospects for
detecting the direct production of third generation squarks in models with an
inverted squark mass hierarchy. This is signalled by $b$-jets + $\eslt$ events
harder than in the Standard Model, but softer than those from the production of
gluinos and heavier squarks. We find that these events can be readily separated
from SM background (for third generation squark masses in the 200-400 GeV
range), and the contamination from the much heavier gluinos and squarks
although formidable can effectively be suppressed. Third, we attempt to extract
model-independent information about neutralino properties from LHC data.
assuming only the particle content of the MSSM and that all two-body neutralino
decays are kinematically suppressed, with the neutralino inclusive production
yielding a sufficient cross section. We show that the Lorentz invariant
dilepton mass distribution encodes clear information about the relative sign of
the mass eigenvalues of the parent and daughter neutralinos. We show that we
can extract most neutralino mass matrix parameters if there is a double mass
edge.
