Measurement of the form factors of the decay B0→D*−ℓ+νℓ and determination of the CKM matrix element |Vcb|
Year: 2010
Type: article
Abstract: This article describes a determination of the Cabibbo-Kobayashi-Maskawa matrix element $|{V}_{cb}|$ from the decay ${B}^{0}\ensuremath{\rightarrow}{D}^{*\ensuremath{-}}{\ensuremath{\ell}}^{+}{\ensuremath{\nu}}_{\ensuremath{\ell}}$ using $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of Belle data collected near the $\ensuremath{\Upsilon}(4S)$ resonance. We simultaneously measure the product of the form factor normalization $\mathcal{F}(1)$ and the matrix element $|{V}_{cb}|$ as well as the three parameters ${\ensuremath{\rho}}^{2}$, ${R}_{1}(1)$ and ${R}_{2}(1)$, which determine the form factors of this decay in the framework of the heavy quark effective theory. The results, based on about 120 000 reconstructed ${B}^{0}\ensuremath{\rightarrow}{D}^{*\ensuremath{-}}{\ensuremath{\ell}}^{+}{\ensuremath{\nu}}_{\ensuremath{\ell}}$ decays, are ${\ensuremath{\rho}}^{2}=1.214\ifmmode\pm\else\textpm\fi{}0.034\ifmmode\pm\else\textpm\fi{}0.009$, ${R}_{1}(1)=1.401\ifmmode\pm\else\textpm\fi{}0.034\ifmmode\pm\else\textpm\fi{}0.018$, ${R}_{2}(1)=0.864\ifmmode\pm\else\textpm\fi{}0.024\ifmmode\pm\else\textpm\fi{}0.008$ and $\mathcal{F}(1)|{V}_{cb}|=(34.6\ifmmode\pm\else\textpm\fi{}0.2\ifmmode\pm\else\textpm\fi{}1.0)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$. The branching fraction of ${B}^{0}\ensuremath{\rightarrow}{D}^{*\ensuremath{-}}{\ensuremath{\ell}}^{+}{\ensuremath{\nu}}_{\ensuremath{\ell}}$ is measured at the same time; we obtain a value of $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}{D}^{*\ensuremath{-}}{\ensuremath{\ell}}^{+}{\ensuremath{\nu}}_{\ensuremath{\ell}})=(4.58\ifmmode\pm\else\textpm\fi{}0.03\ifmmode\pm\else\textpm\fi{}0.26)%$. The errors correspond to the statistical and systematic uncertainties. These results give the most precise determination of the form factor parameters and $\mathcal{F}(1)|{V}_{cb}|$ to date. In addition, a direct, model-independent determination of the form factor shapes has been carried out.
Authors: W. Dungel, C. Schwanda, I. Adachi, H. Aihara, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, E. Barberio, M. Bischofberger, A. Bozek, M. Bračko, T. E. Browder, P. Chang, Y. Chao, A. Chen, P. Chen, B. G. Cheon, R. Chistov, I.-S. Cho, K. Cho, K.-S. Choi, Y. Choi, J. Dalseno, A. Drutskoy, S. Eidelman, H. Ha, J. Haba, H. Hayashii, Y. Horii, Y. Hoshi, W.-S. Hou, T. Iijima, K. Inami, M. Iwabuchi, Y. Iwasaki, N. J. Joshi, T. Julius, J. H. Kang, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y.-J. Kwon, S.-H. Kyeong, M. J. Lee, S.-H. Lee, J. Li, A. Limosani, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, H. Miyata, R. Mizuk, G. B. Mohanty, T. Mori, E. Nakano, M. Nakao, Z. Natkaniec, S. Neubauer, S. Nishida, O. Nitoh, T. Nozaki, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, C. W. Park, H. Park, H. K. Park, M. Petrič, L. E. Piilonen, M. Prim, M. Röhrken, M. Rozanska, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, A. J. Schwartz, K. Senyo, M. E. Sevior, J.-G. Shiu, J. B. Singh, P. Smerkol, A. Sokolov, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, S. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, R. Wedd, K. M. Williams, E. Won, Y. Yamashita, D. Zander, Z. P. Zhang, P. Zhou, V. Zhulanov, T. Zivko
Institutions: Institute of High Energy Physics, High Energy Accelerator Research Organization, The University of Tokyo, Institute for Theoretical and Experimental Physics, École Polytechnique Fédérale de Lausanne, Tata Institute of Fundamental Research, The University of Sydney, The University of Melbourne, Nara Women's University, Institute of Nuclear Physics, Polish Academy of Sciences, Jožef Stefan Institute, University of Maribor, University of Hawaiʻi at Mānoa, University of Hawaii System, National Taiwan University, National Central University, Hanyang University, Yonsei University, Korea Institute of Science & Technology Information, Sungkyunkwan University, Max Planck Institute for Physics, Excellence Cluster Universe, Technical University of Munich, University of Cincinnati, Novosibirsk State University, Budker Institute of Nuclear Physics, Korea University, Tohoku University, Tohoku Gakuin University, Nagoya University, Niigata University, Kyungpook National University, The Graduate University for Advanced Studies, SOKENDAI, University of Ljubljana, Karlsruhe Institute of Technology, Tokyo Metropolitan University, Seoul National University, University of Science and Technology of China, Osaka City University, Tokyo University of Agriculture and Technology, Kanagawa University, Virginia Tech, Panjab University, Institute for High Energy Physics, University of Nova Gorica, Saga University, National United University, Chinese Academy of Sciences, Institute of High Energy Physics, Nippon Dental University, Wayne State University
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, U.S. Department of Energy, National Research Foundation, Ministry of Education, Culture, Sports, Science and Technology, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, National Natural Science Foundation of China, National Science Council, Ministry of Education and Science of the Russian Federation, Korea Institute of Science and Technology, Korea Institute of Science and Technology Information, National Research Foundation of Korea, Javna Agencija za Raziskovalno Dejavnost RS, National Institute of Informatics, Japan Society for the Promotion of Science
OpenAlex ID: W2146490664