Journal article

Measurement of the form factors of the decay B-0 -> D*(-) l( ) v(l) and determination of the CKM matrix element vertical bar V-cb vertical bar

W Dungel, C Schwanda, I Adachi, H Aihara, T Aushev, T Aziz, AM Bakich, V Balagura, E Barberio, M Bischofberger, A Bozek, M Bracko, TE Browder, P Chang, Y Chao, A Chen, P Chen, BG Cheon, R Chistov, I-S Cho Show all

Phys.Rev.D | AMER PHYSICAL SOC | Published : 2010


This article describes a determination of the Cabibbo-Kobayashi-Maskawa matrix element |V | from the decay B0→D⊃* ℓ ν using 711fb of Belle data collected near the Υ(4S) resonance. We simultaneously measure the product of the form factor normalization F(1) and the matrix element |V | as well as the three parameters ρ2, R (1) and R (1), which determine the form factors of this decay in the framework of the heavy quark effective theory. The results, based on about 120000 reconstructed B0→D⊃* ℓ ν decays, are ρ2=1.214±0.034±0.009, R (1)=1.401±0. 034±0.018, R (1)=0.864±0.024±0.008 and F(1)|V |=(34.6±0.2±1.0)×10 . The branching fraction of B0→D⊃* ℓ ν is measured at the same time; we obtain ..

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Awarded by National Natural Science Foundation of China

Awarded by Ministry of Education, Youth and Sports of the Czech Republic

Funding Acknowledgements

We thank the KEKB group for the excellent operation of the accelerator, the KEK cryogenics group for the efficient operation of the solenoid, and the KEK computer group and the National Institute of Informatics for valuable computing and SINET3 network support. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan, the Japan Society for the Promotion of Science (JSPS), and the Tau-Lepton Physics Research Center of Nagoya University; the Australian Research Council and the Australian Department of Industry, Innovation, Science and Research; the National Natural Science Foundation of China under Contract Nos. 10575109, 10775142, 10875115 and 10825524; the Ministry of Education, Youth and Sports of the Czech Republic under Contract Nos. LA10033 and MSM0021620859; the Department of Science and Technology of India; the BK21 and WCU program of the Ministry Education Science and Technology, National Research Foundation of Korea, and NSDC of the Korea Institute of Science and Technology Information; the Polish Ministry of Science and Higher Education; the Ministry of Education and Science of the Russian Federation and the Russian Federal Agency for Atomic Energy; the Slovenian Research Agency; the Swiss National Science Foundation; the National Science Council and the Ministry of Education of Taiwan; and the U.S. Department of Energy. This work is supported by a Grant-in-Aid from MEXT for Science Research in a Priority Area ("New Development of Flavor Physics"), and from JSPS for Creative Scientific Research ("Evolution of Tau-lepton Physics").