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Search for decays of the Z to unstable neutral leptons with mass between 2.5 and 22 GeV

  • P. R. Burchat
  • , M. King
  • , G. S. Abrams
  • , C. E. Adolphsen
  • , D. Averill
  • , J. Ballam
  • , B. C. Barish
  • , T. Barklow
  • , B. A. Barnett
  • , J. Bartelt
  • , S. Bethke
  • , D. Blockus
  • , G. Bonvicini
  • , A. Boyarski
  • , B. Brabson
  • , A. Breakstone
  • , F. Bulos
  • , D. L. Burke
  • , R. J. Cence
  • , J. Chapman
  • M. Chmeissani, D. Cords, D. P. Coupal, P. Dauncey, H. C. Destaebler, D. E. Dorfan, J. M. Dorfan, D. C. Drewer, R. Elia, G. J. Feldman, D. Fernandes, R. C. Field, W. T. Ford, C. Fordham, R. Frey, D. Fujino, K. K. Gan, C. Gatto, E. Gero, G. Gidal, T. Glanzman, G. Goldhaber, J. J.Gomez Cadenas, G. Gratta, G. Grindhammer, P. Grosse-Wiesmann, G. Hanson, R. Harr, B. Harral, F. A. Harris, C. M. Hawkes, K. Hayes, C. Hearty, C. A. Heusch, M. D. Hildreth, T. Himel, D. A. Hinshaw, S. J. Hong, D. Hutchinson, J. Hylen, W. R. Innes, R. G. Jacobsen, J. A. Jaros, C. K. Jung, J. A. Kadyk, J. Kent, S. R. Klein, D. S. Koetke, S. Komamiya, W. Koska, L. A. Kowalski, W. Kozanecki, J. F. Kral, M. Kuhlen, L. Labarga, A. J. Lankford, R. R. Larsen, F. Le Diberder, M. E. Levi, A. M. Litke, X. C. Lou, V. L̈th, J. A. McKenna, J. A.J. Matthews, T. Mattison, B. D. Milliken, K. C. Moffeit, C. T. Munger, W. N. Murray, J. Nash, H. Ogren, K. F. O'Shaughnessy, S. I. Parker, C. Peck, M. L. Perl, F. Perrier, M. Petradza, R. Pitthan, F. C. Porter, P. Rankin, K. Riles, F. R. Rouse, D. R. Rust, H. F.W. Sadrozinski, M. W. Schaad, B. A. Schumm, A. Seiden, J. G. Smith, A. Snyder, E. Soderstrom, D. P. Stoker, R. Stroynowski, M. Swartz, R. Thun, G. H. Trilling, R. Van Kooten, P. Voruganti, S. R. Wagner, S. Watson, P. Weber, A. Weigend, A. J. Weinstein, A. J. Weir, E. Wicklund, M. Woods, D. Y. Wu, M. Yurko, C. Zaccardelli, C. Von Zanthier
  • University of California at Santa Cruz
  • University of California at Berkeley
  • Indiana University Bloomington
  • SLAC National Accelerator Laboratory
  • California Institute of Technology
  • Johns Hopkins University
  • University of Michigan, Ann Arbor
  • University of Hawai'i at Mānoa
  • University of Colorado Boulder

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)3542-3545
Number of pages4
JournalPhysical Review D
Volume41
Issue number11
DOIs
StatePublished - 1990

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