Measurement of the τ lepton mass at the KEDR detector

В.в Анашин ,N Yu Muchnoi,S S Petrosyan,E V Kremyanskaya,E I Shubin,Yu A Tikhonov,A N Yushkov,E A Kravchenko,A E Blinov,A P Onuchin,I B Nikolaev,Е А Симонов ,В А Киселев ,A Bogomyagkov ,A Barnyakov ,P Piminov ,V I Telnov ,Г В Карпов ,V Blinov ,G.ya Kurkin ,Э А Купер ,K Kotov ,A.n Skrinsky ,S.b Oreshkin ,A A Talyshev ,D.v Bondarev ,S E Mishnev ,V.v Gulevich ,A M Soukharev ,А.а Рубан ,Д.а Максимов ,A Bondar ,Y Usov ,A Bobrov ,S E Karnaev ,Yu I Skovpen ,S.g Pivovarov ,Victor Smaluk ,A.g Shamov ,V.g Prisekin ,A Poluektov ,A.k Barladyan ,S.e Baru ,Maksim Struchalin ,B Shwartz ,A L Maslennikov ,D Shatilov ,O Meshkov ,K Yu Todyshev ,E Levichev ,С А Никитин ,V K Sandyrev ,V V Neufeld ,S V Karpov ,Viktor Bobrovnikov ,Г Е Поспелов ,S V Peleganchuk ,И Орлов ,O Beloborodova ,V P Cherepanov ,Vladimir Petrov ,S Eidelman ,V Aulchenko ,S.a Kononov ,G.m Tumaikin ,А.і Воробйов ,V Zhilich ,И И Морозов ,V Kulikov ,А С Медведко ,M.yu Barnyakov ,А А Осипов ,В М Малышев ,V.a Tayursky ,I Bedny ,S Sinyatkin ,Yu.m Glukhovchenko ,E M Baldin ,G.a Savinov ,V Sidorov ,А Р Бузыкаев ,А Н Журавлев

doi:10.1134/s0021364007080012

Measurement of the τ lepton mass at the KEDR detector

В.в Анашин , N Yu Muchnoi + Show 80 more

https://doi.org/10.1134/s0021364007080012

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Journal: JETP Letters	Publication Date: Jun 1, 2007
Citations: 43

Affiliation: Budker Institute of Nuclear Physics

#KEDR Detector #VEPP-4M Collider + Show 5 more

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Abstract

A precise τ lepton mass measurement performed at the VEPP-4M collider with the KEDR detector is reported. The mass value is evaluated from the τ+τ− cross section behavior around the production threshold. The result based on 6.7 pb−1 of data is mτ = 1776.81−0.23+0.25 ± 0.15 MeV. Using 0.8 pb−1 of data collected at the ψ′ peak, we have also determined that ΓeeBττ(ψ′) = 9.0 ± 2.6 eV.

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