Published October 1, 2010
| Version v1
Journal article
Evidence for B-→τ-ντ with a semileptonic tagging method
Creators
- Hara, K.1
- Iijima, T.1
- Hayasaka, K.1
- Inami, K.1
- Miyazaki, Y.1
- Mori, T.1
- Ohshima, T.1
- Senyo, K.1
- Aihara, H.2
- Aulchenko, V.3, 4
- Bondar, A.3, 4
- Eidelman, S.3, 4
- Gabyshev, N.3, 4
- Kuzmin, A.3, 4
- Shwartz, B.3, 4
- Zhilich, V.3, 4
- Zyukova, O.3, 4
- Aushev, T.5, 6
- Aziz, T.7
- Mohanty, G. B.7
- and others
- Belle Collaboration
- 1. Nagoya University, Nagoya (Japan)
- 2. Department of Physics, University of Tokyo, Tokyo (Japan)
- 3. Novosibirsk State University, Novosibirsk (Russian Federation)
- 4. Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)
- 5. Institute for Theoretical and Experimental Physics, Moscow (Russian Federation)
- 6. Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland)
- 7. Tata Institute of Fundamental Research, Mumbai (India)
Description
We present a measurement of the decay B-→τ-ντ using a data sample containing 657x106 BB pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. A sample of B+B- pairs are tagged by reconstructing one B+ meson decaying semileptonically. We detect the B-→τ-ντ candidate in the recoil. We obtain a signal with a significance of 3.6 standard deviations including systematic uncertainties, and measure the branching fraction to be B(B-→τ-ντ)=[1.54-0.37+0.38(stat)-0.31+0.29(syst)]x10-4. This result confirms the evidence for B-→τ-ντ obtained in a previous Belle measurement that used a hadronic B tagging method.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.82.071101;
- arXiv
- arXiv:1006.4201v3;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 82
- Journal Issue
- 7
- Journal Page Range
- p. 071101-071101.7
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 42015727
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- ASYMMETRY; B MINUS MESONS; B PLUS MESONS; BRANCHING RATIO; MESONS; PARTICLE DECAY; RESONANCE; SEMILEPTONIC DECAY; TAU NEUTRINOS; TAU PARTICLES
- Descriptors DEC
- B MESONS; BEAUTY MESONS; BEAUTY PARTICLES; BOSONS; DECAY; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; HEAVY LEPTONS; LEPTONS; MASSLESS PARTICLES; MESONS; NEUTRINOS; PARTICLE DECAY; PSEUDOSCALAR MESONS; WEAK PARTICLE DECAY
Optional Information
- Notes
- (c) 2010 American Institute of Physics
- Collaborations
- Belle Collaboration