Measurements of<i>Z</i>-boson resonance parameters in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">−</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>annihilation

1989149 citationsJournal Articlegreen Open Access

Authors

G. S. Abrams

C. Adolphsen

Abstract

We have measured the mass of the Z boson to be 91.14\ifmmode\pm\else\textpm\fi{}0.12 GeV/${c}^{2}$, and its width to be ${2.42}_{\mathrm{\ensuremath{-}}0.35}^{+0.45}$ 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\ifmmode\pm\else\textpm\fi{}0.10 GeV, corresponding to 2.8\ifmmode\pm\else\textpm\fi{}0.6 neutrino species, with a 95%-confidence-level upper limit of 3.9.

Topics & Keywords

Particle physics theoretical and experimental studies Dark Matter and Cosmic Phenomena Neutrino Physics Research

Publication Details

Published in: Physical Review Letters

Volume 63, Issue 20, pp. 2173-2176

DOI: 10.1103/physrevlett.63.2173

Field-Weighted Citation Impact: 68.30

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Abstract

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Publication Details