FNAL-E-0799()
KTeV: Search for the decay $K_L \to \pi^0 e^+ e^-$
()
- Proposed: Jan 2, 1989,
- Approved: Jun 29, 1989,
- Started: Oct, 1991,
- Completed: 9999
KTeV Collaboration
The goal is to use rare KL decays as a probe of the CP violation. Phase-I modifies the existing apparatus of FNAL-731 to handle increased KL flux and an extended decay region, and to provide a better muon identification. Studies various multibody rare KL decays, and pi0 decays. Phase-I completed data taking in January 92. Phase-II uses a new beamline and a new detector including a new CsI calorimeter to improve the rejection of KL --> e+ e- gamma gamma background from the KL --> pi0 e+ e- signal. It also uses a new transition radiation detector (TRD) to achieve a better pi/e rejection. The sensitivity is expected to approach the 10**-11 level for many rare KL decays. See also the closely related FNAL-832 experiment. Phase-II is now taking data (July 96).
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