- Burchat, PR
- King, M
- Abrams, GS
- Adolphsen, CE
- Averill, D
- Ballam, J
- Barish, BC
- Barklow, T
- Barnett, BA
- Bartelt, J
- Bethke, S
- Blockus, D
- Bonvicini, G
- Boyarski, A
- Brabson, B
- Breakstone, A
- Bulos, F
- Burke, DL
- Cence, RJ
- Chapman, J
- Chmeissani, M
- Cords, D
- Coupal, DP
- Dauncey, P
- DeStaebler, HC
- Dorfan, DE
- Dorfan, JM
- Drewer, DC
- Elia, R
- Feldman, GJ
- Fernandes, D
- Field, RC
- Ford, WT
- Fordham, C
- Frey, R
- Fujino, D
- Gan, KK
- Gatto, C
- Gero, E
- Gidal, G
- Glanzman, T
- Goldhaber, G
- Gomez Cadenas JJ
- Gratta, G
- Grindhammer, G
- Grosse-Wiesmann, P
- Hanson, G
- Harr, R
- Harral, B
- Harris, FA
- Hawkes, CM
- Hayes, K
- Hearty, C
- Heusch, CA
- Hildreth, MD
- Himel, T
- Hinshaw, DA
- Hong, SJ
- Hutchinson, D
- Hylen, J
- Innes, WR
- Jacobsen, RG
- Jaros, JA
- Jung, CK
- et al.
Using the sample of neutral vector bosons (Z's) produced at the SLAC Linear Collider and detected with the Mark II detector, we search for the decay of the Z to a pair of particles, one of which decays to two charged particles. The observed number of Z decays with this signature excludes, at a confidence level greater than 95%, the decay of the Z to a pair of fourth-generation Dirac neutrinos with mass between 2.5 and 22 GeV, a decay length less than about 1 cm, and coupling to any of the first three generations of charged leptons. This is the first time the existence of such a lepton coupling to the ± has been excluded by a direct search. © 1990 The American Physical Society.