Measurements of Partial Branching Fractions of Inclusive $B \to X_u \, \ell^+\, \nu_{\ell}$ Decays with Hadronic Tagging
- Cao, L.
- Sutcliffe, W.
- van Tonder, R.
- Bernlochner, F.U.
- Adachi, I.
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- Asner, D.M.
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- Bhardwaj, V.
- Bilka, T.
- Biswal, J.
- Bonvicini, G.
- Bozek, A.
- Bračko, M.
- Browder, T.E.
- Campajola, M.
- Červenkov, D.
- Chang, M.-C.
- Chang, P.
- Chekelian, V.
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- Cheon, B.G.
- Chilikin, K.
- Cho, H.E.
- Cho, K.
- Cho, S.-J.
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- Choi, Y.
- Choudhury, S.
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- De Nardo, G.
- Di Capua, F.
- Dingfelder, J.
- Doležal, Z.
- Dong, T.V.
- Dubey, S.
- Eidelman, S.
- Epifanov, D.
- Ferber, T.
- Ferlewicz, D.
- Frey, A.
- Fulsom, B.G.
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- Gaur, V.
- Garmash, A.
- Giri, A.
- Goldenzweig, P.
- Guan, Y.
- Hadjivasiliou, C.
- Hara, T.
- Hartbrich, O.
- Hayasaka, K.
- Hayashii, H.
- Hedges, M.T.
- Hernandez Villanueva, M.
- Hou, W.-S.
- Hsu, C.-L.
- Iijima, T.
- Inami, K.
- Ishikawa, A.
- Itoh, R.
- Iwasaki, M.
- Iwasaki, Y.
- Jacobs, W.W.
- Jang, E.-J.
- Jeon, H.B.
- Jia, S.
- Jin, Y.
- Joo, C.W.
- Joo, K.K.
- Kang, K.H.
- Karyan, G.
- Kawasaki, T.
- Kichimi, H.
- Kiesling, C.
- Kim, B.H.
- Kim, C.H.
- Kim, D.Y.
- Kim, H.J.
- Kim, K.-H.
- Kim, S.H.
- Kim, Y.-K.
- Kinoshita, K.
- Kodyš, P.
- Konno, T.
- Korobov, A.
- Korpar, S.
- Kotchetkov, D.
- Kovalenko, E.
- Križan, P.
- Kroeger, R.
- Krokovny, P.
- Kuhr, T.
- Kumar, M.
- Kumar, R.
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- Piilonen, L.E.
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- Prim, M.T.
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- Sumiyoshi, T.
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- Trabelsi, K.
- Uchida, M.
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- Uno, S.
- Urquijo, P.
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- Varner, G.
- Varvell, K.E.
- Vinokurova, A.
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- Waheed, E.
- Wang, C.H.
- Wang, E.
- Wang, M.-Z.
- Wang, P.
- Watanabe, M.
- Watanuki, S.
- Wehle, S.
- Wiechczynski, J.
- Won, E.
- Xu, X.
- Yabsley, B.D.
- Yan, W.
- Yang, S.B.
- Ye, H.
- Yin, J.H.
- Yuan, C.Z.
- Yusa, Y.
- Zhang, Z.P.
- Zhilich, V.
- Zhukova, V.
- Zhulanov, V.
DOIAbstract
International audienceWe present measurements of partial branching fractions of inclusive semileptonic B→Xuℓ+νℓ decays using the full Belle dataset of 711 fb-1 of integrated luminosity at the ϒ(4S) resonance and for ℓ=e, μ. Inclusive semileptonic B→Xuℓ+νℓ decays are Cabibbo-Kobayashi-Maskawa (CKM) suppressed and measurements are complicated by the large background from CKM favored B→Xcℓ+νℓ transitions, which have a similar signature. Using machine learning techniques, we reduce this and other backgrounds effectively, while retaining access to a large fraction of the B→Xuℓ+νℓ phase space and high signal efficiency. We measure partial branching fractions in three phase-space regions covering about 31% to 86% of the accessible B→Xuℓ+νℓ phase ...
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