{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/180903290","title":"Measurement of the CKM Matrix Element $|V_{cb}|$ from $B^{0} \\to D^{*-} \\ell^+ ν_\\ell$ at Belle","arxiv_id":"1809.03290","date":"2018-09-10","proceeding":null,"authors":["E. Waheed","P. Urquijo","I. Adachi","K. Adamczyk","H. Aihara","S. Al Said","D. M. Asner","H. Atmacan","T. Aushev","R. Ayad","V. Babu","I. Badhrees","V. Bansal","P. Behera","C. Beleno","F. Bernlochner","B. Bhuyan","T. Bilka","J. Biswal","A. Bobrov","G. Bonvicini","A. Bozek","M. Bracko","T. E. Browder","M. Campajola","D. Cervenkov","P. Chang","V. Chekelian","A. Chen","B. G. Cheon","K. Chilikin","H. E. Cho","K. Cho","S. -K. Choi","Y. Choi","S. Choudhury","D. Cinabro","S. Cunliffe","S. Di Carlo","Z. Dolezal","T. V. Dong","D. Dossett","S. Eidelman","D. Epifanov","J. E. Fast","B. G. Fulsom","R. Garg","V. Gaur","A. Garmash","A. Giri","P. Goldenzweig","B. Golob","O. Grzymkowska","J. Haba","T. Hara","K. Hayasaka","H. Hayashii","M. T. Hedges","W. -S. Hou","C. -L. Hsu","T. Iijima","K. Inami","G. Inguglia","A. Ishikawa","M. Iwasaki","Y. Iwasaki","W. W. Jacobs","H. B. Jeon","S. Jia","Y. Jin","D. Joffe","K. K. Joo","J. Kahn","A. B. Kaliyar","G. Karyan","T. Kawasaki","C. H. Kim","D. Y. Kim","K. T. Kim","S. H. Kim","K. Kinoshita","P. Kodys","S. Korpar","D. Kotchetkov","P. Krizan","R. Kroeger","P. Krokovny","T. Kuhr","R. Kulasiri","A. Kuzmin","Y. -J. Kwon","J. S. Lange","J. Y. Lee","S. C. Lee","C. H. Li","L. K. Li","Y. B. Li","L. Li Gioi","J. Libby","K. Lieret","D. Liventsev","P. -C. Lu","T. Luo","J. MacNaughton","M. Masuda","D. Matvienko","M. Merola","F. Metzner","K. Miyabayashi","H. Miyata","R. Mizuk","G. B. Mohanty","T. Mori","R. Mussa","I. Nakamura","M. Nakao","K. J. Nath","Z. Natkaniec","M. Nayak","M. Niiyama","N. K. Nisar","S. Nishida","K. Nishimura","S. Ogawa","H. Ono","P. Pakhlov","G. Pakhlova","B. Pal","S. Pardi","H. Park","S. -H. Park","S. Paul","R. Pestotnik","L. E. Piilonen","V. Popov","E. Prencipe","M. Prim","A. Rostomyan","G. Russo","Y. Sakai","M. Salehi","S. Sandilya","T. Sanuki","V. Savinov","O. Schneider","G. Schnell","J. Schueler","C. Schwanda","Y. Seino","K. Senyo","O. Seon","M. E. Sevior","V. Shebalin","C. P. Shen","J. -G. Shiu","B. Shwartz","F. Simon","A. Sokolov","E. Solovieva","S. Stanic","M. Staric","Z. S. Stottler","J. F. Strube","T. Sumiyoshi","M. Takizawa","K. Tanida","F. Tenchini","K. Trabelsi","M. Uchida","T. Uglov","Y. Unno","S. Uno","Y. Usov","G. Varner","K. E. Varvell","A. Vinokurova","A. Vossen","C. H. Wang","M. -Z. Wang","P. Wang","E. Won","S. B. Yang","H. Ye","Y. Yusa","Z. P. Zhang","V. Zhilich","V. Zhukova"],"abstract":"We present a new measurement of the CKM matrix element $|V_{cb}|$ from $B^{0} \\to D^{*-} \\ell^+ \\nu_\\ell$ decays, reconstructed with the full Belle data set of $711 \\, \\rm fb^{-1}$ integrated luminosity. Two form factor parameterizations, originally conceived by the Caprini-Lellouch-Neubert (CLN) and the Boyd, Grinstein and Lebed (BGL) groups, are used to extract the product $\\mathcal{F}(1)\\eta_{\\rm EW}|V_{cb}|$ and the decay form factors, where $\\mathcal{F}(1)$ is the normalization factor and $\\eta_{\\rm EW}$ is a small electroweak correction. In the CLN parameterization we find $\\mathcal{F}(1)\\eta_{\\rm EW}|V_{cb}| = (35.06 \\pm 0.15 \\pm 0.56) \\times 10^{-3}$, $\\rho^{2}=1.106 \\pm 0.031 \\pm 0.007$, $R_{1}(1)=1.229 \\pm 0.028 \\pm 0.009$, $R_{2}(1)=0.852 \\pm 0.021 \\pm 0.006$. For the BGL parameterization we obtain $\\mathcal{F}(1)\\eta_{\\rm EW}|V_{cb}|= (34.93 \\pm 0.23 \\pm 0.59)\\times 10^{-3}$, which is consistent with the World Average when correcting for $\\mathcal{F}(1)\\eta_{\\rm EW}$. The branching fraction of $B^{0} \\to D^{*-} \\ell^+ \\nu_\\ell$ is measured to be $\\mathcal{B}(B^{0}\\rightarrow D^{*-}\\ell^{+}\\nu_{\\ell}) = (4.90 \\pm 0.02 \\pm 0.16)\\%$. We also present a new test of lepton flavor universality violation in semileptonic $B$ decays, $\\frac{{\\cal B }(B^0 \\to D^{*-} e^+ \\nu)}{{\\cal B }(B^0 \\to D^{*-} \\mu^+ \\nu)} = 1.01 \\pm 0.01 \\pm 0.03~$. The errors correspond to the statistical and systematic uncertainties respectively. This is the most precise measurement of $\\mathcal{F}(1)\\eta_{\\rm EW}|V_{cb}|$ and form factors to date and the first experimental study of the BGL form factor parameterization in an experimental measurement.","url_abs":"http://arxiv.org/abs/1809.03290v3","url_pdf":"http://arxiv.org/pdf/1809.03290v3.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"180903290","repo_url":"https://github.com/talismanbrandi/Belle_1809.03290","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}