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Measurement of the τ-lepton lifetime at Belle.
- Source :
-
Physical review letters [Phys Rev Lett] 2014 Jan 24; Vol. 112 (3), pp. 031801. Date of Electronic Publication: 2014 Jan 23. - Publication Year :
- 2014
-
Abstract
- The lifetime of the τ lepton is measured using the process e+ e- → τ+ τ- , where both τ leptons decay to 3πν(τ). The result for the mean lifetime, based on 711 fb(-1) of data collected with the Belle detector at the ϒ(4S) resonance and 60 MeV below, is τ=(290.17±0.53(stat)±0.33(syst))×10(-15) s. The first measurement of the lifetime difference between τ+ and τ- is performed. The upper limit on the relative lifetime difference between positive and negative τ leptons is |Δτ|/τ<7.0×10(-3) at 90% C.L.
- Subjects :
- Quantum Theory
Elementary Particles
Models, Theoretical
Nuclear Physics methods
Subjects
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 112
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 24484129
- Full Text :
- https://doi.org/10.1103/PhysRevLett.112.031801