List of Figures

• Feynman diagram for a Cabibbo suppressed decay
• SU(4) baryon multiplets
• Spectrum of excited -like baryons
• Charm lifetime contributions
• Lifetimes of the charmed hadrons
• Diagram of photon-gluon fusion
• Diagram of Fermilab accelerators
• Diagram of the Tevatron
• The Wide Band photon beamline
• Schematic view of RESH, POSH, and BGM
• Diagram of the target region
• Orientation of PWC wire planes
• Straw tube chambers
• Origin of radiation
• Arrangement of detector cells
• Schematic view of the Inner Electromagnetic calorimeter
• Examples of the dielectron trigger logic
• Side view of the OE
• Layout of the OE tiebreaker tiles
• Schematic views of the Hadron Calorimeter
• Efficiency of the HC energy trigger
• The Inner Muon Hodoscope arrays
• Cross section of an RPC module
• Schematic view of the OMU RPCs
• The and OH hodoscope arrays
• Arrangement of IM1H, IM1V, and IM2H arrays
• Structural overview of the DAQ
• Spectrometer regions and Vee algorithms
• Illustration of vee topology
• SSD and MIC Vee signals
• M1 Vee signals
• One-link SSD Vee signals
• Illustration of kink topology
• Illustration of the cascade topology
• and $\Omega^-$ signals
• signals
• IE electron signals
• Overview of the FOCUS reconstruction process
• Diagram of the Pass1 process
• Diagram of the Skim1 process
• Schematic of a decay
• Effect of using momentum vectors
• Effect of using direction vectors
• Effect of CITADL cuts on the kaon and pion
• Effect of CITADL cuts on the proton
• Effect of isolation cuts
• Effect of kinematic cuts
• candidates used in the reconstruction of and
• candidates used in the reconstruction of
• Mass difference distributions for and
• Mass difference distributions for
• $\lc \piplus$ backgrounds
• normalizing signals
• and systematics from fitting and reconstruction methods
• Reconstructed Monte Carlo distributions for and
• and mass differences
• and mass differences as a function of the cut
• and systematic errors from split samples
• Summary of split sample systematic errors
• Final values of , , and
• and data $\sigma$'s for and decays
• mass differences for data and
• candidates used in the reconstruction of and
• mass differences for data and
• Reconstructed Monte Carlo distributions for and
• Normalized errors for distributions
• A comparison of and data momentum
• A study of $\Xi^0(1530) \to \Xi^- \piplus$
• Data and split samples for particle & antiparticle
• Data and split samples for
• Data and split samples in run period
• Data and split samples split in $p(\lc)$
• Data and split samples in $p(\pi_s)$
• Data and split samples in target number
• Normalized errors for fits to distributions
• Normalized errors for fits to randomly split data distributions
• candidates used in the reconstruction of and
• Mass difference distributions for and
• Feynman diagrams for decays
• candidates used in the search for states
• signals for three decay modes of and
• Mass plots for the $\lc \kminus \piplus$ channel
• Mass plots for the $\lc \kminus \piplus \piplus$ channel
• Mass plots for the $\lc \kminus \piplus \piplus \piminus$channel
• D signals used in the study
• Before and after signals
• Summary of reconstruction methods
• Summary of size cuts
• Effect of momentum cuts
• Summary of mass difference cuts
• Effect of asymmetry cuts
• Effect of a cut on $\chi^2$ from
• Effect of arbitration

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Introduction 

intro