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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- "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1207.6244","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2012-07-26T11:43:35Z","cross_cats_sorted":[],"title_canon_sha256":"7ac01808c31a97b18aa8bcada621681b3063a3b8d814ce91ac527c37d5c69152","abstract_canon_sha256":"4c6c4a8b83cae81dc38df385b4be4476aa67771bde7b2567d4239c1b4af9cdba"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:07.216428Z","signature_b64":"josSvg0wG3ezIKUgUDwmeU6ZXJqkcMHS3KyUjiiSowbCNt6mnED5EwdH+ol/YyHrFdvZesjg5x09P4nJMj6gBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d5bac7183b3fe26195f310694982da9f491677ce26029d4088e0e68e1f244dc8","last_reissued_at":"2026-05-18T01:56:07.215783Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:07.215783Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"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. 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