Precise Measurements of the Parameters PHI(+-), Mass Difference, and Lifetime in the Neutral Kaon System and Tests of CPT Symmetry.

This thesis describes the measurement of several parameters of the neutral kaon system by the E773 experiment at the Fermi National Accelerator Laboratory (Fermilab). A measurement of phi_{+ -}, the phase of the CP-violating amplitude ratio eta_{+-}, has been made. The result, phi_{+ -} = 43.53^circ +/- 0.97^ circ helps to limit CPT-violating effects in the kaon system. Precise determinations of the K_ {s} lifetime and K_{L }-K_{s} mass difference have also been made, yielding tau_{S } = (0.8941 +/- 0.0017) times 10^ {-10}s and Delta m = (0.5297 +/- 0.0037) times 10^{10} hbar s.