Measurement of the CKM matrix element vertical bar V-cb vertical bar from B-0 -> D*(-)l(+)nu(l) at Belle

Waheed, E. ; Urquijo, P. ; Ferlewicz, D. ; Adachi, I. ; Adamczyk, K. ; Aihara, H. ; Al Said, S. ; Asner, D. M. ; Atmacan, H. ; Aushev, T. ; Ayad, R. ; Babu, V. ; Badhrees, I. ; Bansal, V. ; Behera, P. ; Beleno, C. ; Bernlochner, F. ; Bhuyan, B. ; Bilka, T. ; Biswal, J. ; Bobrov, A. ; Bonvicini, G. ; Bozek, A. ; Bracko, M. ; Browder, T. E. ; Campajola, M. ; Cervenkov, D. ; Chang, P. ; Chekelian, V. ; Chen, A. ; Cheon, B. G. ; Chilikin, K. ; Cho, H. E. ; Cho, K. ; Choi, S. -K. ; Choi, Y. ; Choudhury, S. ; Cinabro, D. ; Cunliffe, S. ; Di Carlo, S. ; Dolezal, Z. ; Dong, T. V. ; Dossett, D. ; Eidelman, S. ; Epifanov, D. ; Fast, J. E. ; Fulsom, B. G. ; Garg, R. ; Gaur, V. ; Garmash, A. ; Giri, A. ; Goldenzweig, P. ; Golob, B. ; Grzymkowska, O. ; Haba, J. ; Hara, T. ; Hayasaka, K. ; Hayashii, H. ; Hedges, M. T. ; Hou, W. -S. ; Hsu, C. -L. ; Iijima, T. ; Inami, K. ; Inguglia, G. ; Ishikawa, A. ; Iwasaki, M. ; Iwasaki, Y. ; Jacobs, W. W. ; Jeon, H. B. ; Jia, S. ; Jin, Y. ; Joffe, D. ; Joo, K. K. ; Kahn, J. ; Kaliyar, A. B. ; Karyan, G. ; Kawasaki, T. ; Kim, C. H. ; Kim, D. Y. ; Kim, K. T. ; Kim, S. H. ; Kinoshita, K. ; Kodys, P. ; Korpar, S. ; Kotchetkov, D. ; Krizan, P. ; Kroeger, R. ; Krokovny, P. ; Kuhr, T. ; Kulasiri, R. ; Kuzmin, A. ; Kwon, Y. -J. ; Lange, J. S. ; Lee, J. Y. ; Lee, S. C. ; Li, C. H. ; Li, L. K. ; Li, Y. B. ; Gioi, L. Li ; Libby, J. ; Lieret, K. ; Liventsev, D. ; Lu, P. -C. ; Luo, T. ; MacNaughton, J. ; Masuda, M. ; Matvienko, D. ; Merola, M. ; Metzner, F. ; Miyabayashi, K. ; Miyata, H. ; Mizuk, R. ; Mohanty, G. B. ; Mori, T. ; Mussa, R. ; Nakamura, I. ; Nakao, M. ; Nath, K. J. ; Natkaniec, Z. ; Nayak, M. ; Niiyama, M. ; Nisar, N. K. ; Nishida, S. ; Nishimura, K. ; Ogawa, S. ; Ono, H. ; Pakhlov, P. ; Pakhlova, G. ; Pal, B. ; Pardi, S. ; Park, H. ; Park, S. -H. ; Paul, S. ; Pestotnik, R. ; Piilonen, L. E. ; Popov, V. ; Prencipe, E. ; Prim, M. ; Rostomyan, A. ; Russo, G. ; Sakai, Y. ; Salehi, M. ; Sandilya, S. ; Sanuki, T. ; Savinov, V. ; Schneider, O. ; Schnell, G. ; Schueler, J. ; Schwanda, C. ; Seino, Y. ; Senyo, K. ; Seon, O. ; Sevior, M. E. ; Shebalin, V. ; Shen, C. P. ; Shiu, J. -G. ; Shwartz, B. ; Simon, F. ; Sokolov, A. ; Solovieva, E. ; Stanic, S. ; Staric, M. ; Stottler, Z. S. ; Strube, J. F. ; Sumiyoshi, T. ; Takizawa, M. ; Tanida, K. ; Tenchini, F. ; Trabelsi, K. ; Uchida, M. ; Uglov, T. ; Unno, Y. ; Uno, S. ; Usov, Y. ; Varner, G. ; Varvell, K. E. ; Vinokurova, A. ; Vossen, A. ; Wang, C. H. ; Wang, M. -Z. ; Wang, P. ; Won, E. ; Yang, S. B. ; Ye, H. ; Yusa, Y. ; Zhang, Z. P. ; Zhilich, V. ; Zhukova, V.

We present a new measurement of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cb vertical bar from B-0 -> D*(-)l(+)nu(l) decays, reconstructed with the full Belle data set of 711 fb(-1) integrated luminosity. Two form factor parametrizations, originally conceived by the Caprivi-Lellouch-Neubert (CLN) and the Boyd, Grinstein and Lebed (BGL) groups, are used to extract the product F(1)eta(EW)vertical bar V-cb vertical bar and the decay form factors, where F(1) is the normalization factor and eta(EW) is a small electroweak correction. In the CLN parametrization we find F(1)eta(EW)vertical bar V-cb vertical bar = (35.06 +/- 0.15 +/- 0.56) x 10(-3), rho(2) = 1.106 +/- 0.031 +/- 0.007, R-1 (1) = 1.229 +/- 0.028 +/- 0.009, R-2(1) = 0.852 +/- 0.021 +/- 0.006. For the BGL parametrization we obtain ,F(1)eta(EW)vertical bar V-cb vertical bar = (34.93 +/- 0.23 +/- 0.59) x 10(-3), which is consistent with the world average when correcting for F(1)eta(EW). The branching fraction of B-0 -> D*(-)l(+)nu(l )is measured to be B(B-0 -> D*(-)l(+)nu(l))= (4.90 +/- 0.02 +/- 0.16)%. We also present a new test of lepton flavor universality violation in semileptonic B decays, B(B-0 -> D*(-)e(+)nu)/B(B-0 -> D*(-)mu(+)nu) = 1.01 +/- 0.01 +/- 0.03. The errors quoted correspond to the statistical and systematic uncertainties, respectively. This is the most precise measurement of F(1)eta(EW)vertical bar V-cb vertical bar and form factors to date and the first experimental study of the BGL form factor parametrization in an experimental measurement.


Published in:
Physical Review D, 100, 5, 052007
Year:
Sep 11 2019
ISSN:
2470-0010
2470-0029
Keywords:
Laboratories:




 Record created 2019-09-26, last modified 2019-12-05

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