{"paper":{"title":"Measurement of the decay $B^0\\to\\pi^-\\ell^+\\nu$ and determination of $|V_{ub}|$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Bay, A. Bondar, A. Bozek, A. Chen, A. Drutskoy, A. J. Schwartz, A. Kuzmin, A. Limosani, A. M. Bakich, A. Sokolov, A. Vossen, A. Zupanc, B. Bhuyan, B. G. Cheon, B. Golob, B. R. Ko, C.-C. Chiang, C. H. Wang, C. Kiesling, C. Liu, C. P. Shen, C. Schwanda, C. W. Park, D. Liventsev, E. Barberio, E. Nakano, E. Won, F. Simon, G. B. Mohanty, G. Pakhlova, G. Varner, H. Aihara, H. Ha, H. Hayashii, H. J. Hyun, H. J. Kim, H. K. Park, H. Miyata, H. Nakazawa, H. O. Kim, H. Park, H. Sahoo, I. Adachi, I.-S. Cho, J. Dalseno, J.-G. Shiu, J. Haba, J. H. Kang, J. S. Lange, K. Belous, K. Cho, K. E. Varvell, K. Hayasaka, K. Inami, K. Kinoshita, K. Miyabayashi, K. Nishimura, K.-S. Choi, K. Senyo, K. Trabelsi, L. E. Piilonen, M. Bischofberger, M. Bracko, M. Danilov, M. E. Sevior, M. Iwabuchi, M. J. Kim, M. J. Lee, M. Nakao, M. Petric, M. Rohrken, M. Shapkin, M. Staric, M. Watanabe, M.-Z. Wang, N. Gabyshev, N. J. Joshi, O. Nitoh, O. Schneider, P. Chen, P. Krizan, P. Pakhlov, P. Smerkol, P. Wang, P. Zhou, R. Itoh, R. Louvot, R. Pestotnik, S. Eidelman, S. E. Vahsen, S.-H. Kyeong, S.-H. Lee, S. K. Kim, S. Korpar, S. L. Olsen, S. McOnie, S. Neubauer, S. Nishida, S. Ogawa, S. Okuno, S. Ryu, S. Stanic, S. Uehara, S. Uno, T. Aziz, T. E. Browder, T. Iijima, T. Julius, T. Kawasaki, T. Kuhr, T. Kumita, T. Mori, T. Nozaki, T. Ohshima, T. Sumiyoshi, T. Uglov, T. Zivko, V. Balagura, V. Bhardwaj, V. Zhulanov, W. Dungel, W.-S. Hou, Y. B. Hsiung, Y. Chao, Y. Choi, Y. Horii, Y. Hoshi, Y. Iwasaki, Y. J. Kim, Y.-J. Kwon, Y. Li, Y. Liu, Y. Miyazaki, Y. Nagasaka, Y. Sakai, Y.-S. Sohn, Y. Teramoto, Y. Unno, Y. Watanabe, Y. Yamashita, Z. Dolezal, Z. Natkaniec, Z. P. Zhang","submitted_at":"2010-12-01T03:58:49Z","abstract_excerpt":"We present a measurement of the charmless semileptonic decay $B^0\\to\\pi^-\\ell^+\\nu$ using a data sample containing 657$\\times 10^6$ $B\\bar{B}$ events collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider operating near the $\\Upsilon(4S)$ resonance. We determine the total branching fraction of the decay, $\\mathcal{B}(B^0\\to\\pi^-\\ell^+\\nu)=(1.49\\pm 0.04{(\\mathrm{stat})}\\pm 0.07{(\\mathrm{syst})})\\times 10^{-4}$. We also report a new precise measurement of the differential decay rate, and extract the Cabibbo-Kobayashi-Maskawa matrix element $|V_{ub}|$ using model-indepe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.0090","kind":"arxiv","version":4},"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"}