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Search for Rare Charm Meson Decays at FNAL E791
We report the results of a blind search for flavor-changing neutral current
(FCNC), lepton-flavor violating, and lepton-number violating decays of D+, Ds+,
and D0 mesons (and their antiparticles) into 2-, 3-, and 4-body states
including a lepton pair. Such decays may involve Flavor-Changing Neutral
Currents, Leptoquarks, Horizontal Gauge Bosons, or Majorana Neutrinos. No
evidence for any of these decays is found. Therefore, we present 90% confidence
level branching fraction upper limits, typically at the 0.0001 level. A total
of 51 decay channels have been examined; 26 have not been previously reported
and 18 are significant improvements over previous results.Comment: 15 pages, 5 figures, LaTex, Fermilab E791 Collaboration, References
added in revised version, 2nd Frontiers in Contemporary Physics: The Inner
Space Outer Space Connection (FCP01), 5-10 Mar 2001, Nashville, Tennessee,
US
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