Search for elastic nondiagonal lepton-pair production in e+e- annihilation at s =29 GeV

J. J. Gomez-Cadenas, C. A. Heusch, G. Abrams, C. E. Adolphsen, C. Akerlof, J. P. Alexander, M. Alvarez, D. Amidei, A. R. Baden, J. Ballam, B. C. Barish, T. Barklow, B. A. Barnett, J. Bartelt, D. Blockus, G. Bonvicini, A. Boyarski, J. Boyer, B. Brabson, A. BreakstoneJ. M. Brom, F. Bulos, P. R. Burchat, D. L. Burke, F. Butler, F. Calvino, R. J. Cence, J. Chapman, D. Cords, D. P. Coupal, H. C. Destaebler, D. E. Dorfan, J. M. Dorfan, P. S. Drell, G. J. Feldman, E. Fernandez, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, G. Gidal, L. Gladney, T. Glanzman, M. S. Gold, G. Goldhaber, L. Golding, A. Green, P. Grosse-Wiesmann, J. Haggerty, G. Hanson, R. Harr, F. A. Harris, C. M. Hawkes, K. Hayes, D. Herrup, T. Himel, M. Hoenk, R. J. Hollebeek, D. Hutchinson, J. Hylen, W. R. Innes, M. Jaffre, J. A. Jaros, I. Juricic, J. A. Kadyk, D. Karlen, J. Kent, S. R. Klein, A. Koide, W. Koska, W. Kozanecki, A. J. Lankford, R. R. Larsen, B. W. Leclaire, M. E. Levi, Z. Li, A. M. Litke, N. S. Lockyer, V. L̈th, C. Matteuzzi, J. A.J. Matthews, D. I. Meyer, B. D. Milliken, K. C. Moffeit, L. M̈ller, J. Nash, M. E. Nelson, D. Nitz, H. Ogren, R. A. Ong, K. F. O'Shaughnessy, S. I. Parker, C. Peck, A. Petersen, M. Petradza, F. C. Porter, P. Rankin, B. Richter

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


We have searched for the annihilation of e+e- into the exclusive channels e and at s =29 GeV, using 226 and 133 pb-1, respectively, of data taken with the Mark II detector at the SLAC storage ring PEP. The resulting candidate sample is compatible with the expected background from pair production. Our analysis yields 95%-C.L. cross-section limits of e/<1.8×10-3 and /<6.1×10-3, where is the QED cross section for production of a lepton pair. This is the first high-Q2 test of lepton-flavor conservation involving leptons.

Original languageEnglish (US)
Pages (from-to)1007-1010
Number of pages4
JournalPhysical Review Letters
Issue number8
StatePublished - 1991
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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