Lancaster EPrints

Determination of the leptonic branching ratios of the Z

Decamp, D. and Finch, Alexander (1990) Determination of the leptonic branching ratios of the Z. Physics Letters B, 234 (3). pp. 399-408. ISSN 0370-2693

Full text not available from this repository.

Abstract

The ratios of the numbers of Z bosons decaying to e+e−, μ+μ− and τ+τ− pairs to the number decaying to hadrons have been measured. The branching ratios and partial widths for each channel were determined and found to be equal, consistent with lepton universality. The mean leptonic branching ratio was found to be 0.0321 ± 0.0013 and the leptonic partial width to be 85.4 ± 5.3 MeV. The partial widths for hadronic decays and for invisible decays were deduced to be 1833 ± 116 MeV and 569 ± 92 MeV, respectively. The number of light neutrino types, assuming only the standard model value for the ratio , was found to be 3.35 ± 0.41.

Item Type: Article
Journal or Publication Title: Physics Letters B
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 63825
Deposited By: ep_importer_pure
Deposited On: 02 May 2013 15:31
Refereed?: Yes
Published?: Published
Last Modified: 21 Oct 2017 03:11
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/63825

Actions (login required)

View Item