{"paper":{"title":"Evidence for B- -> Ds+ K- l- nubar and search for B- -> Ds*+ K- l- nubar","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Bondar, A. Bozek, A. Chen, A. Drutskoy, A. Ishikawa, A. Kuzmin, A. M. Bakich, A. Moll, A. Sibidanov, A. Sokolov, A. Zupanc, B. Bhuyan, B. D. Yabsley, Belle Collaboration: J. Stypula, B. G. Cheon, B. Golob, B. R. Ko, C. Kiesling, C. Liu, C. Ng, C. P. Shen, C. Schwanda, C. W. Park, D. Liventsev, D. M. Asner, D. Santel, E. Nakano, E. Solovieva, E. Won, F. Simon, G. B. Mohanty, G. Bonvicini, G. Pakhlova, G. Varner, H. Aihara, H. Farhat, H. Hayashii, H. J. Hyun, H. J. Kim, H. Kichimi, H. K. Park, H. Miyata, H. Park, H. Sahoo, H. Yamamoto, I. Adachi, I.-S. Cho, J. B. Kim, J. Dalseno, J. Dingfelder, J. E. Fast, J.-G. Shiu, J. Haba, J. H. Kang, J. H. Kim, J. Li, J. Libby, J. Wiechczynski, K. Adamczyk, K. Cho, K. E. Varvell, K. Hayasaka, K. Inami, K. Kinoshita, K. Miyabayashi, K. M. Williams, K. Nishimura, K. Senyo, K. T. Kim, L. E. Piilonen, M. Bischofberger, M. Bra\\v, M.-C. Chang, M. Danilov, M. E. Sevior, M. Iwabuchi, M. Nakao, M. Petri\\v, M. Ritter, M. R\\\"ohrken, M. Rozanska, M. Shapkin, M. Stari\\v, M. Sumihama, M. Uchida, M. Watanabe, N. Gabyshev, N. Muramatsu, O. Nitoh, O. Schneider, O. Seon, P. Chang, P. Chen, P. Kapusta, P. Kody\\v, P. Kri\\v, P. Krokovny, P. Pakhlov, P. Smerkol, P. Urquijo, P. Vanhoefer, P. Wang, R. Chistov, R. Gillard, R. Itoh, R. Louvot, R. Mizuk, R. Pestotnik, R. T. Kouzes, S. Eidelman, S.-H. Lee, S. Korpar, S. L. Olsen, S. Nishida, S. Ogawa, S. Okuno, S. Ryu, S. Sandilya, S. Stani\\v, S. Uno, T.-A. Shibata, T. Aushev, T. E. Browder, T. Iijima, T. Julius, T. Kawasaki, T. K. Pedlar, T. Kuhr, T. Kumita, T. Nozaki, T. Ohshima, T. Sanuki, T. Sumiyoshi, T. Uglov, V. Bhardwaj, V. Chekelian, V. Gaur, V. Vorobyev, V. Zhilich, V. Zhulanov, W.-S. Hou, X. L. Wang, Y. B. Hsiung, Y. Choi, Y. Horii, Y. Hoshi, Y. Iwasaki, Y. J. Kim, Y.-J. Kwon, Y. Li, Y. Liu, Y. M. Goh, Y. Miyazaki, Y. Onuki, Y. Sakai, Y. Sato, Y.-S. Sohn, Y. Teramoto, Y. Unno, Y. Usov, Y. Watanabe, Y. Yamashita, Z. Dole\\v, Z. Dr\\'asal, Z. Natkaniec, Z. P. Zhang, Z. Q. Liu","submitted_at":"2012-07-26T11:43:35Z","abstract_excerpt":"We report measurements of the decays B- -> Ds(*)+ K- l- nubar in a data sample containing 657x10^6 BBbar pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We observe a signal with a significance of 6 sigma for the combined Ds and Ds* modes and find the first evidence of the B- -> Ds+ K- l- nubar decay with a significance of 3.4 sigma. We measure the following branching fractions: BF(B- -> Ds+ K- l nubar) = (0.30 +/- 0.09(stat) +0.11 -0.08(syst)) x 10^-3 and BF(B- -> Ds*+ K- l- nubar) = (0.59 +/- 0.12(stat) +/- 0.15(syst)) x 10^-3 and set an upper limit BF(B- "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.6244","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}