Measurement of the decay B -> Dl nu(l) in fully reconstructed events and determination of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cb vertical bar

Glattauer, R. ; Schwanda, C. ; Abdesselam, A. ; Adachi, I. ; Adamczyk, K. ; Aihara, H. ; Al Said, S. ; Asner, D. M. ; Aushev, T. ; Ayad, R. ; Aziz, T. ; Badhrees, I. ; Bakich, A. M. ; Bansal, V. ; Barberio, E. ; Bhuyan, B. ; Biswal, J. ; Bonvicini, G. ; Bozek, A. ; Bracko, M. ; Breibeck, F. ; Browder, T. E. ; Cervenkov, D. ; Chekelian, V. ; Chen, A. ; Cheon, B. G. ; Chilikin, K. ; Chistov, R. ; Cho, K. ; Chobanova, V. ; Choi, Y. ; Cinabro, D. ; Dalseno, J. ; Danilov, M. ; Dash, N. ; Dingfelder, J. ; Dolezal, Z. ; Drutskoy, A. ; Dutta, D. ; Eidelman, S. ; Farhat, H. ; Fast, J. E. ; Ferber, T. ; Frey, A. ; Fulsom, B. G. ; Gaur, V. ; Gabyshev, N. ; Garmash, A. ; Gillard, R. ; Goh, Y. M. ; Goldenzweig, P. ; Golob, B. ; Greenwald, D. ; Haba, J. ; Hamer, P. ; Hara, T. ; Hasenbusch, J. ; Hayasaka, K. ; Hayashii, H. ; Hou, W. -S. ; Hsu, C. -L. ; Iijima, T. ; Inami, K. ; Inguglia, G. ; Ishikawa, A. ; Jeon, H. B. ; Joffe, D. ; Joo, K. K. ; Julius, T. ; Kang, K. H. ; Kato, E. ; Kawasaki, T. ; Kiesling, C. ; Kim, D. Y. ; Kim, J. B. ; Kim, J. H. ; Kim, K. T. ; Kim, M. J. ; Kim, S. H. ; Kim, Y. J. ; Kinoshita, K. ; Kodys, P. ; Korpar, S. ; Krizan, P. ; Krokovny, P. ; Kuhr, T. ; Kuzmin, A. ; Kwon, Y. -J. ; Lee, I. S. ; Li, L. ; Li, Y. ; Libby, J. ; Liu, Y. ; Liventsev, D. ; Lukin, P. ; Macnaughton, J. ; Masuda, M. ; Matvienko, D. ; Miyabayashi, K. ; Miyata, H. ; Mizuk, R. ; Mohanty, G. B. ; Mohanty, S. ; Moll, A. ; Moon, H. K. ; Mussa, R. ; Nakano, E. ; Nakao, M. ; Nanut, T. ; Natkaniec, Z. ; Nayak, M. ; Nisar, N. K. ; Nishida, S. ; Ogawa, S. ; Okuno, S. ; Oswald, C. ; Pakhlov, P. ; Pakhlova, G. ; Pal, B. ; Park, H. ; Pedlar, T. K. ; Pesntez, L. ; Pestotnik, R. ; Petric, M. ; Piilonen, L. E. ; Pulvermacher, C. ; Rauch, J. ; Ribezl, E. ; Ritter, M. ; Rostomyan, A. ; Sahoo, H. ; Sakai, Y. ; Sandilya, S. ; Santelj, L. ; Sanuki, T. ; Savinov, V. ; Schneider, O. ; Schnell, G. ; Schwartz, A. J. ; Seino, Y. ; Senyo, K. ; Seon, O. ; Sevior, M. E. ; Shebalin, V. ; Shibata, T. -A. ; Shiu, J. -G. ; Shwartz, B. ; Sibidanov, A. ; Simon, F. ; Sohn, Y. -S. ; Sokolov, A. ; Solovieva, E. ; Staric, M. ; Sumiyoshi, T. ; Tamponi, U. ; Teramoto, Y. ; Trabelsi, K. ; Trusov, V. ; Uchida, M. ; Unno, Y. ; Uno, S. ; Urquijo, P. ; Usov, Y. ; Van Hulse, C. ; Vanhoefer, P. ; Varner, G. ; Varvell, K. E. ; Vorobyev, V. ; Vossen, A. ; Wang, C. H. ; Wang, M. -Z. ; Wang, P. ; Watanabe, Y. ; Won, E. ; Yamamoto, H. ; Yamashita, Y. ; Yook, Y. ; Zhang, Z. P. ; Zhilich, V. ; Zhulanov, V. ; Zupanc, A. ; Belle Collaboration

We present a determination of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cb vertical bar using the decay B -> Dl nu(l) (l = e,mu) based on 711 fb(-1) of e(+)e(-) -> Upsilon(4S) data recorded by the Belle detector and containing 772 x 10(6) B (B) over bar pairs. One B meson in the event is fully reconstructed in a hadronic decay mode, while the other, on the signal side, is partially reconstructed from a charged lepton and either a D+ or D-0 meson in a total of 23 hadronic decay modes. The isospin-averaged branching fraction of the decay B -> Dl nu(l) is found to be B(B-0 -> D(-)l(vertical bar)nu(l)) = (2.31 +/- 0.03(stat) +/- 0.11(syst))%. Analyzing the differential decay rate as a function of the hadronic recoil with the parametrization of Caprini, Lellouch, and Neubert and using the form-factor prediction G(1) = 1.0541 +/- 0.0083 calculated by FNAL/MILC, we obtain eta(EW)vertical bar V-cb vertical bar = (40.12 +/- 1.34) x 10(-3), where eta(EW) is the electroweak correction factor. Alternatively, assuming the model-independent form-factor parametrization of Boyd, Grinstein, and Lebed and using lattice QCD data from the FNAL/MILC and HPQCD collaborations, we find eta(EW)vertical bar V-cb vertical bar = (41.10 +/- 1.14) x 10(-3).


Published in:
Physical Review D, 93, 3, 032006
Year:
2016
Publisher:
College Pk, Amer Physical Soc
ISSN:
2470-0010
Laboratories:




 Record created 2016-04-01, last modified 2018-12-03


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