Published November 13, 1989 | Version Published
Journal Article Open

Measurements of Z-boson resonance parameters in e+e- annihilation

Creators

Abstract

We have measured the mass of the Z boson to be 91.14±0.12 GeV/c^2, and its width to be 2.42-0.35+0.45 GeV. If we constrain the visible width to its standard-model value, we find the partial width to invisible decay modes to be 0.46±0.10 GeV, corresponding to 2.8±0.6 neutrino species, with a 95%-confidence-level upper limit of 3.9.

Additional Information

© 1989 The American Physical Society. Received 12 October 1989. This work was supported in part by Department of Energy Contracts No. DE-AC03-81ER40050 (California Institute of Technology), No. DE-AM03-76SF00010 (University of California, Santa Cruz), No. DE-AC02-86ER40253 (University of Colorado), No. DE-AC03-83ER40103 (University of Hawaii), No. DE-AC02-84ER40125 (Indiana University), No. DE-AC03-76SF00098 (LBL), No. DE-AC02-76ER01112 (University of Michigan), and No. DE-AC03-76SF00515 (SLAC), and by the National Science Foundation (Johns Hopkins University).

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Identifiers

Eprint ID
13219
Resolver ID
CaltechAUTHORS:ABRprl89c

Funding

Department of Energy (DOE)
DE-AC03-81ER40050
Department of Energy (DOE)
DE-AM03-76SF00010
Department of Energy (DOE)
DE-AC02-86ER40253
Department of Energy (DOE)
DE-AC03-83ER40103
Department of Energy (DOE)
DE-AC02-84ER40125
Department of Energy (DOE)
DE-AC03-76SF00098
Department of Energy (DOE)
DE-AC02-76ER01112
Department of Energy (DOE)
DE-AC03-76SF00515
NSF

Dates

Created
2009-02-03
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Updated
2023-03-02
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