Experimental upper limits on branching fractions for unexpected decay modes of theτlepton

Autor: M. E. Nelson, A. Blondel, William Carithers, G. S. Abrams, J. A. Kadyk, A. M. Boyarski, S. Cooper, T. Himel, W. Chinowsky, G. Goldhaber, J. Strait, D. L. Burke, Michael Levi, R. J. Hollebeek, E. N. Vella, J. F. Patrick, R. R. Larsen, L̈th, Kenneth G. Hayes, Burton Richter, A. Roussarie, J. Dorfan, G. Gidal, G. Hanson, J. Dorenbosch, G. J. Feldman, M. W. Coles, J. B. Dillon, Rafe Schindler, A. J. Lankford, R. E. Millikan, A. D. Johnson, W. E. Dieterle, Alam, J. A. Jaros, H. Taureg, M. E. B. Franklin, J. L. Siegrist, P. Jenni, I. Videau, H. Zaccone, M. L. Perl, G. H. Trilling, Walter R. Innes, Martin Breidenbach, R. A. Vidal, D. L. Scharre, M. W. Eaton, M. Tonutti, C. Y. Pang, J. M. Weiss, D. G. Hitlin, R. F. Schwitters, CA Blocker
Rok vydání: 1982
Předmět:
Zdroj: Physical Review D. 25:2869-2886
ISSN: 0556-2821
DOI: 10.1103/physrevd.25.2869
Popis: Searches for 12 neutrinoless decay modes of the which violate lepton-number conservation have been made using the reaction e+e-+-. No evidence for lepton-number violation is observed, and we have set upper limits (90% C.L.) on the branching ratio for each decay mode. The branching-ratio limits on the radiative decays and e are 0.055 and 0.064%, respectively. For the charged lepton decays ee, eee, and, the branching ratio limits are 0.040, 0.033, 0.044, and 0.049%, respectively. Upper limits on the branching ratios for the following charged lepton + neutral hadron decays are 0 (0.037%), 0 (0.044%), eK0 (0.13%), K0 (0.10%), 0 (0.21%), and 0 (0.082%). We also use these data to search for the pair production in e+e- annihilation of some unconventional particles with masses less than about 3 GeV/c2. © 1982 The American Physical Society.
Databáze: OpenAIRE