Measurement of the branching ratio of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mover accent="true"><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mo>*</mml:mo><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>τ</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup><mml:msub><mml:mrow><mml:mover accent="true"><mml:mrow><mml:mi>ν</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover></mml:mrow><mml:mrow><mml:mi>τ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>relative to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mover accent="true"><mml:mi>B</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>D</mml:mi><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mo>*</mml:mo><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>−</mml:mo></mml:msup><mml:msub><mml:mover accent="true"><mml:mi>ν</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mo>ℓ</mml:mo></mml:msub></mml:math>decays with hadronic tagging at Belle
M. Huschle(Karlsruhe Institute of Technology), T. Kuhr(Ludwig-Maximilians-Universität München), M. Heck(Karlsruhe Institute of Technology), P. Goldenzweig(Karlsruhe Institute of Technology), A. Abdesselam(University of Tabuk), I. Adachi(High Energy Accelerator Research Organization), K. Adamczyk(Institute of Nuclear Physics, Polish Academy of Sciences), H. Aihara(The University of Tokyo), S. Al Said(King Abdulaziz University), K. Arinstein(Novosibirsk State University), D. M. Asner(Pacific Northwest National Laboratory), T. Aushev(Moscow Institute of Physics and Technology), R. Ayad(University of Tabuk), T. Aziz(Tata Institute of Fundamental Research), I. Badhrees(King Abdulaziz City for Science and Technology), A. M. Bakich(The University of Sydney), V. Bansal(Pacific Northwest National Laboratory), E. L. Barberio(The University of Melbourne), V. Bhardwaj(University of South Carolina), B. Bhuyan(Indian Institute of Technology Guwahati), J. P. Biswal(Jožef Stefan Institute), A. Bobrov(Novosibirsk State University), A. Bożek(Institute of Nuclear Physics, Polish Academy of Sciences), M. Bračko(Jožef Stefan Institute), T. E. Browder(University of Hawaiʻi at Mānoa), D. Červenkov(Charles University), P. Chang(National Taiwan University), V. Chekelian(Max Planck Institute for Physics), K. F. Chen(National Central University), B. G. Cheon(Hanyang University), K. Chilikin(Institute for Theoretical and Experimental Physics), R. Chistov(Institute for Theoretical and Experimental Physics), K. Cho(Korea Institute of Science & Technology Information), V. Chobanova(Max Planck Institute for Physics), Y. Choi(Sungkyunkwan University), D. Cinabro(Wayne State University), J. Dalseno(Max Planck Institute for Physics), M. Danilov(Institute of Engineering Physics), Z. Doležal(Charles University), Z. Drásal(Charles University), D. Dutta(Tata Institute of Fundamental Research), S. Eidelman(Novosibirsk State University), D. Epifanov(The University of Tokyo), H. Farhat(Wayne State University), J. E. Fast(Pacific Northwest National Laboratory), T. Ferber(Deutsches Elektronen-Synchrotron DESY), A. Frey(University of Göttingen), B. G. Fulsom(Pacific Northwest National Laboratory), V. Gaur(Tata Institute of Fundamental Research), N. Gabyshev(Novosibirsk State University), A. Garmash(Novosibirsk State University), R. Gillard(Wayne State University), R. Glattauer, Y. M. Goh(Hanyang University), B. Golob(University of Ljubljana), J. Grygier(Karlsruhe Institute of Technology), P. Hamer(University of Göttingen), K. Hara(High Energy Accelerator Research Organization), T. Hara(High Energy Accelerator Research Organization), J. Hasenbusch(University of Bonn), K. Hayasaka(Nagoya University), H. Hayashii(Nara Women's University), X. H. He(Peking University), M. Heider(Karlsruhe Institute of Technology), Andreas Heller(Karlsruhe Institute of Technology), T. Horiguchi(Tohoku University), W.-S. Hou(National Taiwan University), C.-L. Hsu(The University of Melbourne), T. Iijima(Nagoya University), K. Inami(Nagoya University), G. Inguglia(Deutsches Elektronen-Synchrotron DESY), A. Ishikawa(Tohoku University), R. Itoh(High Energy Accelerator Research Organization), Y. Iwasaki(High Energy Accelerator Research Organization), I. Jaeglé(University of Hawaiʻi at Mānoa), D. Joffe(Kennesaw State University), K. K. Joo(Chonnam National University), T. Julius(The University of Melbourne), K. H. Kang(Kyungpook National University), E. Kato(Tohoku University), P. Katrenko(Institute for Theoretical and Experimental Physics), T. Kawasaki(Niigata University), Thomas M. Keck(Karlsruhe Institute of Technology), C. Kiesling(Max Planck Institute for Physics), D. Y. Kim(Soongsil University), H. J. Kim(Kyungpook National University), J. B. Kim(Korea University), J. H. Kim(Korea University), K. T. Kim(Korea University), M. J. Kim(Kyungpook National University), S. H. Kim(Hanyang University), Y. J. Kim(Korea Institute of Science & Technology Information), K. Kinoshita(University of Cincinnati), B. R. Ko(Korea University), N. Kobayashi(Tokyo Institute of Technology), P. Kodyš(Charles University), S. Korpar(Jožef Stefan Institute), P. Križan(University of Ljubljana), P. Krokovny(Novosibirsk State University), T. Kumita(Tokyo Metropolitan University), A. Kuzmin(Novosibirsk State University), Y.-J. Kwon(Yonsei University), I. S. Lee(Hanyang University), C. Li(The University of Melbourne), Y. Li(Virginia Tech), L. Li Gioi(Max Planck Institute for Physics), J. Libby(Indian Institute of Technology Madras), D. Liventsev(High Energy Accelerator Research Organization), P. Lukin(Novosibirsk State University), M. Masuda(Earthquake Engineering Research Institute), D. Matvienko(Novosibirsk State University), K. Miyabayashi(Nara Women's University), H. Miyake(High Energy Accelerator Research Organization), H. Miyata(Niigata University), R. Mizuk(Institute of Engineering Physics), G. B. Mohanty(Tata Institute of Fundamental Research), Sachi Nandan Mohanty(Tata Institute of Fundamental Research), A. Moll(Max Planck Institute for Physics), H. K. Moon(Korea University), R. Mussa(Istituto Nazionale di Fisica Nucleare, Sezione di Torino), K. R. Nakamura(High Energy Accelerator Research Organization), E. Nakano(Osaka City University), M. Nakao(High Energy Accelerator Research Organization), T. Nanut(Jožef Stefan Institute), M. Nayak(Indian Institute of Technology Madras), N. K. Nisar(Tata Institute of Fundamental Research), S. Nishida(High Energy Accelerator Research Organization), S. Ogawa(Toho University), S. Okuno(Kanagawa University), C. Oswald(University of Bonn), G. Pakhlova(Moscow Institute of Physics and Technology), B. Pal(University of Cincinnati), C. W. Park(Sungkyunkwan University), H. Park(Kyungpook National University), T. K. Pedlar(Luther College), L. Pesántez(University of Bonn), R. Pestotnik(Jožef Stefan Institute), M. Petrič(Jožef Stefan Institute), L. E. Piilonen(Virginia Tech), C. Pulvermacher(Karlsruhe Institute of Technology), E. Ribežl(Jožef Stefan Institute), M. Ritter(Max Planck Institute for Physics), A. Rostomyan(Deutsches Elektronen-Synchrotron DESY), Y. Sakai(High Energy Accelerator Research Organization), S. Sandilya(Tata Institute of Fundamental Research), L. Šantelj(High Energy Accelerator Research Organization), T. Sanuki(Tohoku University), Y. Sato(Nagoya University), V. Savinov(University of Pittsburgh), O. Schneider(École Polytechnique Fédérale de Lausanne), G. Schnell(Ikerbasque), C. Schwanda, A. J. Schwartz(University of Cincinnati), D. Semmler(Justus-Liebig-Universität Gießen), K. Senyo(Yamagata University), O. Seon(Nagoya University), M. E. Sevior(The University of Melbourne), V. Shebalin(Novosibirsk State University), C. P. Shen(Beihang University), T.-A. Shibata(Tokyo Institute of Technology), J.-G. Shiu(National Taiwan University), F. Simon(Max Planck Institute for Physics), Y.-S. Sohn(Yonsei University), A. Sokolov(Institute for High Energy Physics), E. Solovieva(Institute for Theoretical and Experimental Physics), S. Stanič(University of Nova Gorica), M. Starič(Jožef Stefan Institute), M. Steder(Deutsches Elektronen-Synchrotron DESY), J. Stypula(Institute of Nuclear Physics, Polish Academy of Sciences), M. Sumihama(Gifu University), T. Sumiyoshi(Tokyo Metropolitan University), U. Tamponi(Istituto Nazionale di Fisica Nucleare, Sezione di Torino), Y. Teramoto(Osaka City University), K. Trabelsi(High Energy Accelerator Research Organization), V. Trusov(Karlsruhe Institute of Technology), M. Uchida(Tokyo Institute of Technology), T. Uglov(Moscow Institute of Physics and Technology), S. Uno(High Energy Accelerator Research Organization), Y. Usov(Novosibirsk State University), C. Van Hulse(University of the Basque Country), P. Vanhoefer(Max Planck Institute for Physics), G. Varner(University of Hawaiʻi at Mānoa), A. Vinokurova(Novosibirsk State University), V. Vorobyev(Novosibirsk State University), M. N. Wagner(Justus-Liebig-Universität Gießen), C. H. Wang(National United University), M.-Z. Wang(National Taiwan University), P. Wang(Chinese Academy of Sciences), X. L. Wang(Virginia Tech), M. Watanabe(Niigata University), Y. Watanabe(Kanagawa University), E. Won(Korea University), H. Yamamoto(Tohoku University), J. Yamaoka(Pacific Northwest National Laboratory), S. Yashchenko(Deutsches Elektronen-Synchrotron DESY), H. Ye(Deutsches Elektronen-Synchrotron DESY), Y. Yook(Yonsei University), C. Z. Yuan(Chinese Academy of Sciences), Y. Yusa(Niigata University), Z. P. Zhang(University of Science and Technology of China), V. Zhilich(Novosibirsk State University), V. Zhulanov(Novosibirsk State University), A. Zupanc(Jožef Stefan Institute)
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology
October 26, 2015
Cited by 691Open Access
Abstract
We report a measurement of the branching fraction ratios $R({D}^{(*)})$ of $\overline{B}\ensuremath{\rightarrow}{D}^{(*)}{\ensuremath{\tau}}^{\ensuremath{-}}{\overline{\ensuremath{\nu}}}_{\ensuremath{\tau}}$ relative to $\overline{B}\ensuremath{\rightarrow}{D}^{(*)}{\ensuremath{\ell}}^{\ensuremath{-}}{\overline{\ensuremath{\nu}}}_{\ensuremath{\ell}}$ (where $\ensuremath{\ell}=e$ or $\ensuremath{\mu}$) using the full Belle data sample of $772\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ pairs collected at the $\mathrm{\ensuremath{\Upsilon}}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. The measured values are $R(D)=0.375\ifmmode\pm\else\textpm\fi{}0.064(\text{stat})\ifmmode\pm\else\textpm\fi{}0.026(\text{syst})$ and $R({D}^{*})=0.293\ifmmode\pm\else\textpm\fi{}0.038(\text{stat})\ifmmode\pm\else\textpm\fi{}0.015(\text{syst})$. The analysis uses hadronic reconstruction of the tag-side $B$ meson and purely leptonic $\ensuremath{\tau}$ decays. The results are consistent with earlier measurements and do not show a significant deviation from the standard model prediction.
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