- Burchat, PR;
- Feldman, GJ;
- Barklow, T;
- Boyarski, AM;
- Burke, DL;
- Dorfan, JM;
- Gladney, L;
- Hanson, G;
- Hayes, K;
- Hollebeek, RJ;
- Innes, WR;
- Jaros, JA;
- Karlen, D;
- Lankford, AJ;
- Larsen, RR;
- LeClaire, BW;
- Lockyer, NS;
- Lüth, V;
- Matteuzzi, C;
- Ong, RA;
- Perl, ML;
- Richter, B;
- Riles, K;
- Ross, MC;
- Yelton, JM;
- Zaiser, C;
- Abrams, GS;
- Amidei, D;
- Baden, AR;
- Boyer, J;
- Butler, F;
- Gidal, G;
- Gold, MS;
- Goldhaber, G;
- Golding, L;
- Haggerty, J;
- Herrup, D;
- Juricic, I;
- Kadyk, JA;
- Nelson, ME;
- Rowson, PC;
- Schellman, H;
- Schmidke, WB;
- Sheldon, PD;
- Trilling, GH;
- de la Vaissiere, C;
- Wood, DR;
- Levi, ME;
- Schaad, T

The branching fractions for the major decay modes of the lepton are measured from a sample of tagged decays selected from +- pairs produced in e+e- annihilation. The decay products of one member of the +- pair are used to identify the event. The opposite member of the pair is then included in the sample if it satisfies an invariant-mass cut and a charged-multiplicity cut. In this way, we attempt to select an unbiased sample of decays. The sample is divided into categories based on charged- and neutral-particle multiplicities, and charged-particle identification. The branching fractions are measured simultaneously, with an unfold technique and a maximum-likelihood fit, with the sum of the branching fractions constrained to be unity. The branching fractions for the decay modes - K- and - K*- are fixed at the world averages in the fit. The following branching fractions are measured: B(-e) =(19.10.81.1)%, B(-' - )=(18.30.90.8)%, B(-) =(10.01.1 *1,4)%, B(-0) =(25.81.72.5)%, B(-(n0, n>1))=(12.01.42.5)%, B(-+-) =(6.7 0.80.9)%, and B(-+- (n0,n>0)) =(6.10.80.9)%. The total branching fraction to one charged pion plus at least one neutral hadron is measured to be (37.81.21.0)%. Limits on allowed decay modes involving the meson are discussed. © 1987 The American Physical Society.