Measurement of the branching ratio of $\bar{B}^0 \rightarrow D^{*+} \tau^- \bar{\nu}_{\tau}$ relative to $\bar{B}^0 \rightarrow D^{*+} \ell^- \bar{\nu}_{\ell}$ decays with a semileptonic tagging method
- Sato, Y.
- Iijima, T.
- Badhrees, I.
- Nakano, E.
- Nakao, M.
- Nanut, T.
- Nath, K. J.
- Natkaniec, Z.
- Nayak, M.
- Negishi, K.
- Nisar, N. K.
- Nishida, S.
- Ogawa, S.
- Bakich, A. M.
- Okuno, S.
- Olsen, S. L.
- Onuki, Y.
- Pakhlov, P.
- Pakhlova, G.
- Pal, B.
- Park, C. S.
- Paul, S.
- Pedlar, T. K.
- Pesantez, L.
- Bansal, V.
- Pestotnik, R.
- Petric, M.
- Piilonen, L. E.
- Purohit, M. V.
- Rauch, J.
- Rostomyan, A.
- Rozanska, M.
- Sakai, Y.
- Sandilya, S.
- Santelj, L.
- Behera, P.
- Savinov, V.
- Schluter, T.
- Schneider, O.
- Schnell, G.
- Schwanda, C.
- Schwartz, A. J.
- Seino, Y.
- Senyo, K.
- Seon, O.
- Sevior, M. E.
- Bhardwaj, V.
- Shebalin, V.
- Shen, C. P.
- Shibata, T. A.
- Shiu, J. G.
- Shwartz, B.
- Simon, F.
- Solovieva, E.
- Stanic, S.
- Staric, M.
- Strube, J. F.
- Bhuyan, B.
- Sumiyoshi, T.
- Takizawa, M.
- Tamponi, U.
- Tenchini, F.
- Trabelsi, K.
- Uchida, M.
- Uno, S.
- Urquijo, P.
- Ushiroda, Y.
- Usov, Y.
- Biswal, J.
- Van Hulse, C.
- Varner, G.
- Vinokurova, A.
- Vorobyev, V.
- Wang, C. H.
- Wang, M. Z.
- Wang, P.
- Watanabe, Y.
- Williams, K. M.
- Won, E.
- Bonvicini, G.
- Yamamoto, H.
- Yamaoka, J.
- Yamashita, Y.
- Yelton, J.
- Yook, Y.
- Yuan, C. Z.
- Yusa, Y.
- Zhang, Z. P.
- Zhilich, V.
- Zhukova, V.
- Bozek, A.
- Zhulanov, V.
- Zupanc, A.
- Belle Collaboration
- Bracko, M.
- Adamczyk, K.
- Cervenkov, D.
- Chang, P.
- Chekelian, V.
- Chen, A.
- Cheon, B. G.
- Chilikin, K.
- Chistov, R.
- Cho, K.
- Chobanova, V.
- Choi, Y.
- Aihara, H.
- Cinabro, D.
- Danilov, M.
- Dash, N.
- Di Carlo, S.
- Dolezal, Z.
- Dutta, D.
- Eidelman, S.
- Epifanov, D.
- Farhat, H.
- Fast, J. E.
- Asner, D. M.
- Ferber, T.
- Fulsom, B. G.
- Gaur, V.
- Gabyshev, N.
- Garmash, A.
- Goldenzweig, P.
- Golob, B.
- Greenwald, D.
- Hara, K.
- Hara, T.
- Atmacan, H.
- Hasenbusch, J.
- Hayasaka, K.
- Hayashii, H.
- Hirose, S.
- Horiguchi, T.
- Hou, W. S.
- Inami, K.
- Ishikawa, A.
- Itoh, R.
- Iwasaki, Y.
- Aushev, T.
- Jaegle, I.
- Jeon, H. B.
- Joffe, D.
- Julius, T.
- Kang, K. H.
- Kato, Y.
- Katrenko, P.
- Kawasaki, T.
- Kim, D. Y.
- Kim, J. B.
- Ayad, R.
- Kim, K. T.
- Kim, M. J.
- Kim, S. H.
- Kim, Y. J.
- Kinoshita, K.
- Kodys, P.
- Korpar, S.
- Kotchetkov, D.
- Krokovny, P.
- Kuhr, T.
- Aziz, T.
- Kumar, R.
- Kwon, Y. J.
- Lange, J. S.
- Li, C. H.
- Li, L.
- Li, Y.
- Li Gioi, L.
- Libby, J.
- Liventsev, D.
- Luo, T.
- Babu, V.
- Masuda, M.
- Matsuda, T.
- Matvienko, D.
- Miyabayashi, K.
- Miyata, H.
- Mizuk, R.
- Mohanty, G. B.
- Moll, A.
- Moon, H. K.
- Nakamura, K. R.
DOIAbstract
We report a measurement of the ratio R(D*)=B(B¯0→D*+τ-ν¯τ)/B(B¯0→D*+ℓ-ν¯ℓ), where ℓ denotes an electron or a muon. The results are based on a data sample containing 772×106 BB¯ pairs recorded at the ϒ(4S) resonance with the Belle detector at the KEKB e+e- collider. We select a sample of B0B¯0 pairs by reconstructing both B mesons in semileptonic decays to D*∓ℓ±. We measure R(D*)=0.302±0.030(stat)±0.011(syst), which is within 1.6σ of the Standard Model theoretical expectation, where the standard deviation σ includes systematic uncertainties. We use this measurement to constrain several scenarios of new physics in a model-independent approach
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