Measurement of the branching ratio of $\overline{B}\to D^{(*)}{\tau }^{-}{\overline{\nu }}_{\tau }$ relative to $\overline{B}\to D^{(*)}{\ell }^{-}{\overline{\nu }}_{\ell }$ decays with hadronic tagging at Belle

Journal Article · Mon Oct 26 00:00:00 EDT 2015 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.92.072014· OSTI ID:1594408

Huschle, M.; Kuhr, T.; Heck, M.; Goldenzweig, P.; Abdesselam, A.; Adachi, I.; Adamczyk, K.; Aihara, H.; Al Said, S.; Arinstein, K.; Asner, D. M.; Aushev, T.; Ayad, R.; Aziz, T.; Badhrees, I.; Bakich, A. M.; Bansal, V.; Barberio, E.; Bhardwaj, V.; Bhuyan, B. ; Biswal, J.; Bobrov, A.; Bozek, A.; Bračko, M.; Browder, T. E.; Červenkov, D.; Chang, P.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Cho, K.; Chobanova, V.; Choi, Y.; Cinabro, D.; Dalseno, J.; Danilov, M.; Doležal, Z.; Drásal, Z.; Dutta, D.; Eidelman, S.; Epifanov, D.; Farhat, H.; Fast, J. E.; Ferber, T.; Frey, A.; Fulsom, B. G.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gillard, R.; Glattauer, R.; Goh, Y. M.; Golob, B.; Grygier, J.; Hamer, P.; Hara, K.; Hara, T.; Hasenbusch, J.; Hayasaka, K.; Hayashii, H.; He, X. H.; Heider, M.; Heller, A.; Horiguchi, T.; Hou, W. -S.; Hsu, C. -L.; Iijima, T.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Jaegle, I.; Joffe, D.; Joo, K. K.; Julius, T.; Kang, K. H.; Kato, E.; Katrenko, P.; Kawasaki, T.; Keck, T.; Kiesling, C.; Kim, D. Y.; Kim, H. J.; Kim, J. B.; Kim, J. H.; Kim, K. T.; Kim, M. J.; Kim, S. H.; Kim, Y. J.; Kinoshita, K.; Ko, B. R.; Kobayashi, N.; Kodyš, P.; Korpar, S.; Križan, P.; Krokovny, P.; Kumita, T.; Kuzmin, A.; Kwon, Y. -J.; Lee, I. S.; Li, C.; Li, Y.; Li Gioi, L.; Libby, J.; Liventsev, D.; Lukin, P.; Masuda, M.; Matvienko, D.; Miyabayashi, K.; Miyake, H.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Mohanty, S.; Moll, A.; Moon, H. K.; Mussa, R.; Nakamura, K. R.; Nakano, E.; Nakao, M.; Nanut, T.; Nayak, M.; Nisar, N. K.; Nishida, S.; Ogawa, S.; Okuno, S.; Oswald, C.; Pakhlova, G.; Pal, B.; Park, C. W.; Park, H.; Pedlar, T. K.; Pesántez, L.; Pestotnik, R.; Petrič, M.; Piilonen, L. E.; Pulvermacher, C.; Ribežl, E.; Ritter, M.; Rostomyan, A.; Sakai, Y.; Sandilya, S.; Santelj, L.; Sanuki, T.; Sato, Y.; Savinov, V.; Schneider, O.; Schnell, G.; Schwanda, C.; Schwartz, A. J.; Semmler, D.; Senyo, K.; Seon, O.; Sevior, M. E.; Shebalin, V.; Shen, C. P.; Shibata, T. -A.; Shiu, J. -G.; Simon, F.; Sohn, Y. -S.; Sokolov, A.; Solovieva, E.; Stanič, S.; Starič, M.; Steder, M.; Stypula, J.; Sumihama, M.; Sumiyoshi, T.; Tamponi, U.; Teramoto, Y.; Trabelsi, K.; Trusov, V.; Uchida, M.; Uglov, T.; Uno, S.; Usov, Y.; Van Hulse, C.; Vanhoefer, P.; Varner, G.; Vinokurova, A.; Vorobyev, V.; Wagner, M. N.; Wang, C. H.; Wang, M. -Z.; Wang, P.; Wang, X. L.; Watanabe, M.; Watanabe, Y.; Won, E.; Yamamoto, H.; Yamaoka, J.; Yashchenko, S.; Ye, H.; Yook, Y.; Yuan, C. Z.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zhulanov, V.; Zupanc, A.

In this article we report a measurement of the branching fraction ratios $R\left(D^{(*)}\right)$ of $\overline{B}\to D^{(*)}{\tau }^{-}{\overline{\nu }}_{\tau }$ relative to $\overline{B}\to D^{(*)}{\ell }^{-}{\overline{\nu }}_{\ell }$ (where $\ell =e$ or $\mu$) using the full Belle data sample of $772\times {10}^{6}B\overline{B}$ pairs collected at the $\mathrm{{\rm Y}}\left(4S\right)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. The measured values are $R\left(D\right)=0.375\pm 0.064\left(\text{stat}\right)\pm 0.026\left(\text{syst}\right)$ and $R\left(D^{*}\right)=0.293\pm 0.038\left(\text{stat}\right)\pm 0.015\left(\text{syst}\right)$. The analysis uses hadronic reconstruction of the tag-side $B$ meson and purely leptonic $\tau$ decays. The results are consistent with earlier measurements and do not show a significant deviation from the standard model prediction.

• Research Organization: Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: Belle Collaboration
• Grant/Contract Number: SC0009973; AC05-76RL01830
• OSTI ID: 1594408
• Alternate ID(s): OSTI ID: 1224367
• Report Number(s): PNNL-SA-115498; PRVDAQ; TRN: US2101295
• Journal Information: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 92, Issue 7; ISSN 1550-7998
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

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