期刊
PHYSICAL REVIEW D
卷 97, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.97.012004
关键词
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资金
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan
- Japan Society for the Promotion of Science (JSPS)
- Tau-Lepton Physics Research Center of Nagoya University
- Australian Research Council
- Austrian Science Fund [P 26794-N20]
- National Natural Science Foundation of China [10575109, 10775142, 10875115, 11175187, 11475187, 11521505, 11575017]
- Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-SLH011]
- CAS Center for Excellence in Particle Physics (CCEPP)
- Fudan University [JIH5913023, IDH5913011/003, JIH5913024, IDH5913011/002]
- Ministry of Education, Youth and Sports of the Czech Republic [LTT17020]
- Carl Zeiss Foundation
- Deutsche Forschungsgemeinschaft
- Excellence Cluster Universe
- VolkswagenStiftung
- Department of Science and Technology of India
- Istituto Nazionale di Fisica Nucleare of Italy
- WCU program of the Ministry of Education
- National Research Foundation (NRF) of Korea [2011-0029457, 2012-0008143, 2014R1A2A2A01005286, 2014R1A2A2A01002734, 2015R1A2A2A01003280, 2015H1A2A1033649, 2016R1D1A1B01010135, 2016K1A3A7A09005603, 2016K1A3A7A09005604, 2016R1D1A1B02012900, 2016K1A3A7A09005606, NRF-2013K1A3A7A06056592]
- Brain Korea 21-Plus program of the Korea Institute of Science and Technology Information
- Radiation Science Research Institute of the Korea Institute of Science and Technology Information
- Foreign Large-size Research Facility Application Supporting project of the Korea Institute of Science and Technology Information
- Global Science Experimental Data Hub Center of the Korea Institute of Science and Technology Information
- Polish Ministry of Science and Higher Education
- National Science Center
- Ministry of Education and Science of the Russian Federation
- Russian Foundation for Basic Research
- Slovenian Research Agency
- Ikerbasque, Spain
- Basque Foundation for Science, Spain
- MINECO (Juan de la Cierva), Spain
- Swiss National Science Foundation
- Ministry of Education of Taiwan
- Ministry of Science and Technology of Taiwan
- U.S. Department of Energy
- National Science Foundation
- [26220706]
- [25.3096]
With the full data sample of 772 x 10(6) B (B) over bar pairs recorded by the Belle detector at the KEKB electron-positron collider, the decay (B) over bar -> D+ tau(-)(nu) over bar (tau) is studied with the hadronic tau decays tau(-) -> pi(-)nu(tau) and tau(-) -> rho(-)nu(tau). The tau polarization P-tau(D*) in two-body hadronic tau decays is measured, as well as the ratio of the branching fractions R(D*) = B((B) over bar -> D*tau(-) (nu) over bar (tau))/B((B) over bar -> D*l(-) (nu) over bar (l),where l(-) denotes an electron or a muon. Our results, P-tau (D*) = - 0.38 +/- 0.51(stat)(+0.21)(-0.16) (syst) and R(D*) = 0.270 +/- 0.035(stat)(+0.028)(-0.025)(syst), are consistent with the theoretical predictions of the standard model. The polarization values of P-tau(D*) > +0.5 are excluded at the 90% confidence level.
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