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Golob, B. Pal, B. R. Ko, C. H. Wang, C. Kiesling, C.-L. Hsu, C. Li, C. Oswald, C. P. Shen, C. Pulvermacher, C. Schwanda, C. Van Hulse, C. W. Park, C. Z. Yuan, D. Cinabro, D. Dutta, D. Epifanov, D. Joffe, D. Liventsev, D. M. Asner, D. Matvienko, D. Semmler, D. \\v{C}ervenkov, D. Y. Kim, E. Barberio, E. Kato, E. Nakano, E. Ribe\\v{z}l, E. Solovieva, E. Won, F. Simon, G. B. Mohanty, G. Inguglia, G. Pakhlova, G. Schnell, G. Varner, H. Aihara, H. Farhat, H. Hayashii, H. J. Kim, H. K. Moon, H. Miyake, H. Miyata, H. Park, H. Yamamoto, H. Ye, I. Adachi, I. Badhrees, I. Jaegle, I. S. Lee, J. Biswal, J. B. Kim, J. Dalseno, J. E. Fast, J. Grygier, J.-G. Shiu, J. Hasenbusch, J. H. Kim, J. Libby, J. Stypula, J. Yamaoka, K. Adamczyk, K. Arinstein, K. Chilikin, K. Cho, K. Hara, K. Hayasaka, K. H. Kang, K. Inami, K. Kinoshita, K. K. Joo, K. Miyabayashi, K. R. Nakamura, K. Senyo, K. T. Kim, K. Trabelsi, L. E. Piilonen, L. Li Gioi, L. Pes\\'antez, L. Santelj, M. Bra\\v{c}ko, M. Danilov, M. E. Sevior, M. Heck, M. Heider, M. J. Kim, M. Masuda, M. Nakao, M. Nayak, M. N. Wagner, M. Petri\\v{c}, M. Ritter, M. Stari\\v{c}, M. Steder, M. Sumihama, M. Uchida, M. Watanabe, M.-Z. Wang, N. Gabyshev, N. K. Nisar, N. Kobayashi, O. Schneider, O. Seon, P. Chang, P. Goldenzweig, P. Hamer, P. Katrenko, P. Kody\\v{s}, P. Kri\\v{z}an, P. Krokovny, P. Lukin, P. Vanhoefer, P. Wang, R. Ayad, R. Chistov, R. Gillard, R. Glattauer, R. Itoh, R. Mizuk, R. Mussa, R. Pestotnik, S. Al Said, S. Eidelman, S. H. Kim, S. Korpar, S. Mohanty, S. Nishida, S. Ogawa, S. Okuno, S. Sandilya, S. Stani\\v{c}, S. Uno, S. Yashchenko, T.-A. Shibata, T. Aushev, T. Aziz, T. E. Browder, T. Ferber, T. Hara, T. Horiguchi, T. Iijima, T. Julius, T. Kawasaki, T. Keck, T. K. Pedlar, T. Kuhr, T. Kumita, T. Nanut, T. Sanuki, T. Sumiyoshi, T. Uglov, U. Tamponi, V. Bansal, V. Bhardwaj, V. Chekelian, V. Chobanova, V. Gaur, V. Savinov, V. Shebalin, V. Trusov, V. Vorobyev, V. Zhilich, V. Zhulanov, W.-S. Hou, X. H. He, X. L. Wang, Y. Choi, Y. Iwasaki, Y. J. Kim, Y.-J. Kwon, Y. Li, Y. M. Goh, Y. Sakai, Y. Sato, Y.-S. Sohn, Y. Teramoto, Y. Usov, Y. Watanabe, Y. Yook, Y. Yusa, Z. Dole\\v{z}al, Z. Dr\\'asal, Z. P. Zhang","submitted_at":"2015-07-12T13:34:21Z","abstract_excerpt":"We report a measurement of the branching fraction ratios R(D(*)) of Bbar -> D(*) tau- nubar_tau relative to Bbar -> D()* l- nubar_l (where l = e or mu) using the full Belle data sample of 772 x 10^6 BBbar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The measured values are R(D)= 0.375 +- 0.064(stat.) +- 0.026(syst.) and R(D*) = 0.293 +- 0.038(stat.) +- 0.015(syst.). The analysis uses hadronic reconstruction of the tag-side B meson and purely leptonic tau decays. 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Pedlar, T. Kuhr, T. Kumita, T. Nanut, T. Sanuki, T. Sumiyoshi, T. Uglov, U. Tamponi, V. Bansal, V. Bhardwaj, V. Chekelian, V. Chobanova, V. Gaur, V. Savinov, V. Shebalin, V. Trusov, V. Vorobyev, V. Zhilich, V. Zhulanov, W.-S. Hou, X. H. He, X. L. Wang, Y. Choi, Y. Iwasaki, Y. J. Kim, Y.-J. Kwon, Y. Li, Y. M. Goh, Y. Sakai, Y. Sato, Y.-S. Sohn, Y. Teramoto, Y. Usov, Y. Watanabe, Y. Yook, Y. Yusa, Z. Dole\\v{z}al, Z. Dr\\'asal, Z. P. Zhang","submitted_at":"2015-07-12T13:34:21Z","abstract_excerpt":"We report a measurement of the branching fraction ratios R(D(*)) of Bbar -> D(*) tau- nubar_tau relative to Bbar -> D()* l- nubar_l (where l = e or mu) using the full Belle data sample of 772 x 10^6 BBbar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The measured values are R(D)= 0.375 +- 0.064(stat.) +- 0.026(syst.) and R(D*) = 0.293 +- 0.038(stat.) +- 0.015(syst.). 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