{"paper":{"title":"First Measurement of Inclusive B -> X_s eta Decays","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.J.Schwartz, A.Kuzmin, A.Matyja, A.M.Bakich, A.Sokolov, A.Zupanc, Belle Collaboration: K.Nishimura, B.G.Cheon, B.Golob, B.R.Ko, C.-C.Chiang, C.C.Zhang, C.H.Wang, C.Kiesling, C.Liu, C.P.Shen, C.Schwanda, C.W.Park, D.Liventsev, E.Barberio, E.Nakano, E.Solovieva, E.Won, F.Simon, G.B.Mohanty, G.Pakhlova, G.Varner, H.Aihara, H.Ha, H.Hayashii, H.J.Hyun, H.J.Kim, H.Kawai, H.Kichimi, H.K.Park, H.Miyata, H.O.Kim, H.Park, H.Sahoo, I.Adachi, I.-S.Cho, J.Dalseno, J.-G.Shiu, J.Haba, J.H.Kang, J.Li, J.S.Lange, J.Wicht, K.Arinstein, K.Belous, K.E.Varvell, K.-F.Chen, K.Hayasaka, K.Inami, K.Kinoshita, K.Miyabayashi, K.M.Williams, K.Senyo, K.S.Park, K.Trabelsi, K.Vervink, L.E.Piilonen, M.Bischofberger, M.Bracko, M.-C.Chang, M.Danilov, M.E.Sevior, M.Iwabuchi, M.J.Kim, M.J.Lee, M.Nakao, M.Petric, M.Rohrken, M.Shapkin, M.Staric, M.Yamauchi, M.-Z.Wang, N.Gabyshev, N.J.Joshi, O.Schneider, O.Seon, O.Zyukova, P.Chen, P.Kapusta, P.Kodys, P.Krizan, P.Smerkol, P.Wang, P.Zhou, R.Itoh, R.Louvot, R.Pestotnik, S.Eidelman, S.-H.Kyeong, S.-H.Lee, S.Korpar, S.L.Olsen, S.McOnie, S.Nishida, S.Ogawa, S.Ryu, S.Suzuki, S.Uehara, S.Uno, T.Aushev, T.E.Browder, T.Hara, T.Iijima, T.Julius, T.Kawasaki, T.Kumita, T.Mori, T.Ohshima, T.Sumiyoshi, T.Uglov, T.Zivko, V.Balagura, V.Bhardwaj, V.Zhulanov, W.Ostrowicz, W.-S.Hou, Y.Chao, Y.Choi, Y.Horii, Y.Hoshi, Y.Iwasaki, Y.J.Kim, Y.-J.Kwon, Y.Liu, Y.Miyazaki, Y.Sakai, Y.Teramoto, Y.Unno, Y.Watanabe, Y.Yamashita, Z.Dolezal, Z.Natkaniec, Z.P.Zhang","submitted_at":"2009-10-25T15:45:46Z","abstract_excerpt":"We report a first measurement of inclusive B -> X_s eta decays, where X_s is a charmless state with unit strangeness. The measurement is based on a pseudo-inclusive reconstruction technique and uses a sample of 657 x 10^6 BB-bar pairs accumulated with the Belle detector at the KEKB e^+e^- collider. For M_{X_s} < 2.6 GeV/c^2, we measure a branching fraction of (26.1 +/- 3.0 (stat) +1.9 -2.1 (syst) +4.0 -7.1 (model)) x 10^-5 and a direct CP asymmetry of A_{CP} = -0.13 +/- 0.04 +0.02 -0.03. Over half of the signal occurs in the range M_{X_s} > 1.8 GeV/c^2."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.4751","kind":"arxiv","version":2},"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"}