Determination of the number of light neutrino species

Decamp, D. and Finch, Alexander (1989) Determination of the number of light neutrino species. Physics Letters B, 231 (4). pp. 519-529. ISSN 0370-2693

Full text not available from this repository.

Abstract

The cross-section for e+e− → hadrons in the vicinity of the Z boson peak has been measured with the ALEPH detector at the CERN Large Electron Positron collider, LEP. Measurements of the Z mass, Mz = (91.174±0.070) GeV, the Z width Γz=(2.68±0.15) GeV, and of the peak hadronic cross-section, σhadpeak=(29.3±1.2) nb, are presented. With the constraints of the standard electroweak model, the number of light neutrino species is found to be Nv=3.27±0.30. this results rules out of the possibility of a fourth type of light neutrino at 98% CL.

Item Type: Journal Article
Journal or Publication Title: Physics Letters B
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 63827
Deposited By: ep_importer_pure
Deposited On: 03 May 2013 04:25
Refereed?: Yes
Published?: Published
Last Modified: 30 Sep 2019 17:23
URI: https://eprints.lancs.ac.uk/id/eprint/63827

Actions (login required)

View Item View Item