An upper limit for the τ–neutrino mass from τ→5π±ντ decays

Kartvelishvili, Vakhtang (1998) An upper limit for the τ–neutrino mass from τ→5π±ντ decays. European Physical Journal C: Particles and Fields, 5 (2). pp. 229-237. ISSN 1434-6044

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Abstract

An upper limit for the ττ–neutrino mass has been determined from the decay τ→5π±νττ→5π±ντ using data collected with the OPAL detector from 1991 to 1995 in e+e−e+e− collisions at s√≈MZs≈MZ. A limit of 43.2 MeV at 95% CL is obtained using a two–dimensional method in the 5π5π invariant mass and energy distribution from 22 selected events. Combining this result with OPAL's previously published measurement using τ+τ−→3h±ν¯τ+3h∓νττ+τ−→3h±ν¯τ+3h∓ντ decays, a new combined limit of mντ<27.6mντ<27.6 MeV (95% CL) is obtained.

Item Type: Journal Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 82551
Deposited By: ep_importer_pure
Deposited On: 01 Nov 2016 15:24
Refereed?: Yes
Published?: Published
Last Modified: 11 Feb 2020 09:07
URI: https://eprints.lancs.ac.uk/id/eprint/82551

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