Measurement of the form factors of the decay B0 -&gt; D*- ell+ nu and determination of the CKM matrix element |Vcb|
Creators: name: ~Dungel, W.
name: ~Schwanda, C.
name: ~Adachi, I.
name: ~Aihara, H.
name: ~Aushev, T.
name: ~Aziz, T.
name: ~Bakich, A. ~M.
name: ~Balagura, V.
name: ~Barberio, E.
name: ~Bischofberger, M.
name: ~Bozek, A.
name: ~Bračko, M.
name: ~Browder, T. ~E.
name: ~Chang, P.
name: ~Chao, Y.
name: ~Chen, A.
name: ~Chen, P.
name: ~Cheon, B. ~G.
name: ~Chistov, R.
name: ~Cho, I. -S.
name: ~Cho, K.
name: ~Choi, K. -S.
name: ~Choi, Y.
name: ~Dalseno, J.
name: ~Drutskoy, A.
name: ~Eidelman, S.
name: ~Ha, H.
name: ~Haba, J.
name: ~Hayashii, H.
name: ~Horii, Y.
name: ~Hoshi, Y.
name: ~Hou, W. -S.
name: ~Iijima, T.
name: ~Inami, K.
name: ~Iwabuchi, M.
name: ~Iwasaki, Y.
name: ~Joshi, N. ~J.
name: ~Julius, T.
name: ~Kang, J. ~H.
name: ~Kawasaki, T.
name: ~Kim, H. ~J.
name: ~Kim, H. ~O.
name: ~Kim, J. ~H.
name: ~Kim, M. ~J.
name: ~Kim, Y. ~J.
name: ~Kinoshita, K.
name: ~Ko, B. ~R.
name: ~Krokovny, P.
name: ~Kuhr, T.
name: ~Kumita, T.
name: ~Kuzmin, A.
name: ~Kwon, Y. -J.
name: ~Kyeong, S. -H.
name: ~Lee, M. ~J.
name: ~Lee, S. -H.
name: ~Li, J.
name: ~Limosani, A.
name: ~Liu, C.
name: ~Liu, Y.
name: ~Liventsev, D.
name: ~Louvot, R.
name: ~Matyja, A.
name: ~McOnie, S.
name: ~Miyata, H.
name: ~Mizuk, R.
name: ~Mohanty, G. ~B.
name: ~Mori, T.
name: ~Nakano, E.
name: ~Nakao, M.
name: ~Natkaniec, Z.
name: ~Neubauer, S.
name: ~Nishida, S.
name: ~Nitoh, O.
name: ~Nozaki, T.
name: ~Ohshima, T.
name: ~Okuno, S.
name: ~Olsen, S. ~L.
name: ~Pakhlova, G.
name: ~Park, C. ~W.
name: ~Park, H.
name: ~Park, H. ~K.
name: ~Petrič, M.
name: ~Piilonen, L. ~E.
name: ~Prim, M.
name: ~Röhrken, M.
name: ~Rozanska, M.
name: ~Ryu, S.
name: ~Sahoo, H.
name: ~Sakai, K.
name: ~Sakai, Y.
name: ~Schneider, O.
name: ~Schwartz, A. ~J.
name: ~Senyo, K.
name: ~Sevior, M. ~E.
name: ~Shiu, J. -G.
name: ~Singh, J. ~B.
name: ~Smerkol, P.
name: ~Sokolov, A.
name: ~Stanič, S.
name: ~Starič, M.
name: ~Sumiyoshi, T.
name: ~Suzuki, S.
name: ~Tanaka, S.
name: ~Taylor, G. ~N.
name: ~Teramoto, Y.
name: ~Trabelsi, K.
name: ~Uehara, S.
name: ~Uglov, T.
name: ~Unno, Y.
name: ~Uno, S.
name: ~Urquijo, P.
name: ~Varner, G.
name: ~Varvell, K. ~E.
name: ~Vervink, K.
name: ~Wang, C. ~H.
name: ~Wang, P.
name: ~Watanabe, M.
name: ~Watanabe, Y.
name: ~Wedd, R.
name: ~Williams, K. ~M.
name: ~Won, E.
name: ~Yamashita, Y.
name: ~Zander, D.
name: ~Zhang, Z. ~P.
name: ~Zhou, P.
name: ~Zhulanov, V.
name: ~Zivko, T.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: This article describes a determination of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{cb}|$ from the decay $B^0\to D^{*-}\ell^+ν_\ell$ using 711 fb$^{-1}$ of Belle data collected near the $Υ(4S)$ 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 $ρ^2$, $R_1(1)$ 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 $B^0\to D^{*-}\ell^+ν_\ell$ decays, are $ρ^2=1.214\pm 0.034\pm 0.009$, $R_1(1)=1.401\pm 0.034\pm 0.018$, $R_2(1)=0.864\pm 0.024\pm 0.008$ and $\mathcal{F}(1)|V_{cb}|=(34.6\pm 0.2\pm 1.0)\times 10^{-3}$. The branching fraction of $B^0\to D^{*-}\ell^+ν_\ell$ is measured at the same time; we obtain a value of $\mathcal{B}(B^0 \to D^{*-}\ell^+ ν_\ell) = (4.58 \pm 0.03 \pm 0.26) %$. 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.
description: 16 pages, 7 figures