Published 1989 | Version v1
Report Open

A determination of the properties of the neutral intermediate vector Boson Z0

Creators

Description

We report the results of first physics runs of the L3 detector at LEP. Based on 2538 hadron events, we determined the mass mz0 and the width Γz0 of the intermediate vector boson Z to be mz0 = 91.132 +- 0.057 GeV and Γz0 2.588 +- 0.137 GeV. We also determined Γinvisible 0.567 +- 0.080 GeV, corresponding to 3.42+-0.48 number of neutrino flavors. We also measured the muon pair cross-section and determined the branching ratio μμ/Γh 0.056 +- 0.006. The partial width of Z →e+e' es Γes= 88 +- 9 +- 7 MeV. (Author) 16 refs

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Available from INIS in electronic form

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Additional details

Publishing Information

Imprint Pagination
25 p.
Report number
CIEMAT--640

INIS

Country of Publication
Spain
Country of Input or Organization
Spain
INIS RN
38064890
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
BRANCHING RATIO; CROSS SECTIONS; EFFECTIVE MASS; HADRONS; INTERMEDIATE VECTOR BOSONS; LEP STORAGE RINGS; LEPTONS; MUONS; NEUTRINOS; PARTICLE WIDTHS; Z NEUTRAL BOSONS
Descriptors DEC
ACCELERATORS; BOSONS; CYCLIC ACCELERATORS; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; FERMIONS; INTERMEDIATE BOSONS; INTERMEDIATE VECTOR BOSONS; LEPTONS; MASS; MASSLESS PARTICLES; PARTICLE PROPERTIES; STORAGE RINGS; SYNCHROTRONS