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research article
Measurement of the tau-lepton Lifetime at Belle
The lifetime of the tau lepton is measured using the process e(+) e(-) -> tau(+) tau(-), where both tau leptons decay to 3 pi nu(tau). The result for the mean lifetime, based on 711 fb(-1) of data collected with the Belle detector at the Upsilon(4S) resonance and 60 MeV below, is tau = (290.17 +/- 0.53(stat) +/- 0.33(syst)) x 10(-15) s. The first measurement of the lifetime difference between tau(+) and tau(-) is performed. The upper limit on the relative lifetime difference between positive and negative tau leptons is vertical bar Delta tau vertical bar/tau < 7.0 x 10(-3) at 90% C.L.
Type
research article
Web of Science ID
WOS:000331944100005
Authors
Belous, K.
•
Shapkin, M.
•
Sokolov, A.
•
Adachi, I.
•
Aihara, H.
•
Asner, D. M.
•
Aulchenko, V.
•
Bakich, A. M.
•
Bala, A.
•
Bhuyan, B.
Corporate authors
Belle Collaboration
Publication date
2014
Publisher
Published in
Volume
112
Issue
3
Article Number
031801
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
April 2, 2014
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