Lancaster EPrints

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: Article
Journal or Publication Title: Physics Letters B
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 63827
Deposited By: ep_importer_pure
Deposited On: 03 May 2013 05:25
Refereed?: Yes
Published?: Published
Last Modified: 20 Sep 2017 06:27
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/63827

Actions (login required)

View Item