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

  • Author(s): Gomez-Cadenas, JJ
  • Heusch, CA
  • Abrams, G
  • Adolphsen, CE
  • Akerlof, C
  • Alexander, JP
  • Alvarez, M
  • Amidei, D
  • Baden, AR
  • Ballam, J
  • Barish, BC
  • Barklow, T
  • Barnett, BA
  • Bartelt, J
  • Blockus, D
  • Bonvicini, G
  • Boyarski, A
  • Boyer, J
  • Brabson, B
  • Breakstone, A
  • Brom, JM
  • Bulos, F
  • Burchat, PR
  • Burke, DL
  • Butler, F
  • Calvino, F
  • Cence, RJ
  • Chapman, J
  • Cords, D
  • Coupal, DP
  • DeStaebler, HC
  • Dorfan, DE
  • Dorfan, JM
  • Drell, PS
  • Feldman, GJ
  • Fernandez, E
  • Field, RC
  • Ford, WT
  • Fordham, C
  • Frey, R
  • Fujino, D
  • Gan, KK
  • Gidal, G
  • Gladney, L
  • Glanzman, T
  • Gold, MS
  • Goldhaber, G
  • Golding, L
  • Green, A
  • Grosse-Wiesmann, P
  • Haggerty, J
  • Hanson, G
  • Harr, R
  • Harris, FA
  • Hawkes, CM
  • Hayes, K
  • Herrup, D
  • Himel, T
  • Hoenk, M
  • Hollebeek, RJ
  • Hutchinson, D
  • Hylen, J
  • Innes, WR
  • Jaffre, M
  • et al.
Abstract

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. © 1991 The American Physical Society.

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