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Limits on new-lepton pairs (L-,L0) with arbitrary neutrino mass.

  • Author(s): Stoker, DP
  • Perl, ML
  • Abrams, G
  • Baden, AR
  • Barklow, T
  • Barnett, BA
  • Boyarski, AM
  • Boyer, J
  • Burchat, PR
  • Butler, F
  • Dorfan, JM
  • Feldman, GJ
  • Gidal, G
  • Hanson, G
  • Harral, BD
  • Hayes, K
  • Herrup, D
  • Hylen, JE
  • Innes, WR
  • Jaros, JA
  • Kadyk, JA
  • Karlen, D
  • Klein, SR
  • Lankford, AJ
  • LeClaire, BW
  • Levi, M
  • Lüth, V
  • Matthews, JA
  • Ong, RA
  • Riles, K
  • Rowson, PC
  • Wood, DR
  • et al.
Abstract

We have searched 205 pb-1 of s =29 GeV data from the Mark II detector at the SLAC e+e- storage ring PEP for events which may signify the existence of a new lepton pair (L-,L0) where the L0 may be massive, but does not exceed the L- mass. Three event signatures for L+L- decay are examined: (i) e, (ii) (e or)(+4), and (iii) (e or )(3+0). The numbers of signature events are found to be in good agreement with Monte Carlo simulations of known background sources. The ranges of L- and L0 masses for which new lepton pairs are excluded are obtained using a likelihood-ratio method to compare the number of observed signature events to the expected background, and to the expected background plus Monte Carlo predictions of (L-,L0) signals. © 1989 The American Physical Society.

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