Studies of the semileptonic $\bar B^0\to D^{*+}\ell^-\bar\nu_\ell$ and $B^-\to D^{0}\ell^-\bar\nu_\ell$ decay processes with 34.6 fb$^{-1}$ of Belle II data
Creators: name: Abudinén, F.
name: Adachi, I.
name: Adak, R.
name: Adamczyk, K.
name: Ahlburg, P.
name: Ahn, J. K.
name: Aihara, H.
name: Akopov, N.
name: Aloisio, A.
name: Ameli, F.
name: Andricek, L.
name: Anh Ky, N.
name: Asner, D. M.
name: Atmacan, H.
name: Aulchenko, V.
name: Aushev, T.
name: Aushev, V.
name: Aziz, T.
name: Babu, V.
name: Bacher, S.
name: Baehr, S.
name: Bahinipati, S.
name: Bakich, A. M.
name: Bambade, P.
name: Banerjee, Sw.
name: Bansal, S.
name: Barrett, M.
name: Batignani, G.
name: Baudot, J.
name: Beaulieu, A.
name: Becker, J.
name: Behera, P. K.
name: Bender, M.
name: Bennett, J. V.
name: Bernieri, E.
name: Bernlochner, F. U.
name: Bertemes, M.
name: Bessner, M.
name: Bettarini, S.
name: Bhardwaj, V.
name: Bhuyan, B.
name: Bianchi, F.
name: Bilka, T.
name: Bilokin, S.
name: Biswas, D.
name: Bobrov, A.
name: Bondar, A.
name: Bonvicini, G.
name: Bozek, A.
name: Bračko, M.
name: Branchini, P.
name: Braun, N.
name: Briere, R. A.
name: Browder, T. E.
name: Brown, D. N.
name: Budano, A.
name: Burmistrov, L.
name: Bussino, S.
name: Calò, S.
name: Campajola, M.
name: Cao, L.
name: Caria, G.
name: Casarosa, G.
name: Cecchi, C.
name: Červenkov, D.
name: Chang, M.-C.
name: Chang, P.
name: Cheaib, R.
name: Chekelian, V.
name: Chen, C.
name: Chen, Y. Q.
name: Chen, Y.-T.
name: Cheon, B. G.
name: Chilikin, K.
name: Chirapatpimol, K.
name: Cho, H.-E.
name: Cho, K.
name: Cho, S.-J.
name: Choi, S.-K.
name: Choudhury, S.
name: Cinabro, D.
name: Corona, L.
name: Cremaldi, L. M.
name: Cuesta, D.
name: Cunliffe, S.
name: Czank, T.
name: Dash, N.
name: Dattola, F.
name: De La Cruz-Burelo, E.
name: De Nardo, G.
name: De Nuccio, M.
name: De Pietro, G.
name: De Sangro, R.
name: Deschamps, B.
name: Destefanis, M.
name: Dey, S.
name: De Yta-Hernandez, A.
name: Di Canto, A.
name: Di Capua, F.
name: Di Carlo, S.
name: Dingfelder, J.
name: Doležal, Z.
name: Jiménez, I. Domínguez
name: Dong, T. V.
name: Dort, K.
name: Dossett, D.
name: Dubey, S.
name: Duell, S.
name: Dujany, G.
name: Eidelman, S.
name: Eliachevitch, M.
name: Epifanov, D.
name: Fast, J. E.
name: Ferber, T.
name: Ferlewicz, D.
name: Finocchiaro, G.
name: Fiore, S.
name: Fischer, P.
name: Fodor, A.
name: Forti, F.
name: Frey, A.
name: Friedl, M.
name: Fulsom, B. G.
name: Gabriel, M.
name: Gabyshev, N.
name: Ganiev, E.
name: Garcia-Hernandez, M.
name: Garg, R.
name: Garmash, A.
name: Gaur, V.
name: Gaz, A.
name: Gebauer, U.
name: Gelb, M.
name: Gellrich, A.
name: Gemmler, J.
name: Geßler, T.
name: Getzkow, D.
name: Giordano, R.
name: Giri, A.
name: Glazov, A.
name: Gobbo, B.
name: Godang, R.
name: Goldenzweig, P.
name: Golob, B.
name: Gomis, P.
name: Grace, P.
name: Gradl, W.
name: Graziani, E.
name: Greenwald, D.
name: Guan, Y.
name: Hadjivasiliou, C.
name: Halder, S.
name: Hara, K.
name: Hara, T.
name: Hartbrich, O.
name: Hauth, T.
name: Hayasaka, K.
name: Hayashii, H.
name: Hearty, C.
name: Heck, M.
name: Hedges, M. T.
name: Heredia De La Cruz, I.
name: Villanueva, M. Hernández
name: Hershenhorn, A.
name: Higuchi, T.
name: Hill, E. C.
name: Hirata, H.
name: Hoek, M.
name: Hohmann, M.
name: Hollitt, S.
name: Hotta, T.
name: Hsu, C.-L.
name: Hu, Y.
name: Huang, K.
name: Iijima, T.
name: Inami, K.
name: Inguglia, G.
name: Irakkathil Jabbar, J.
name: Ishikawa, A.
name: Itoh, R.
name: Iwasaki, M.
name: Iwasaki, Y.
name: Iwata, S.
name: Jackson, P.
name: Jacobs, W. W.
name: Jaegle, I.
name: Jaffe, D. E.
name: Jang, E.-J.
name: Jeandron, M.
name: Jeon, H. B.
name: Jia, S.
name: Jin, Y.
name: Joo, C.
name: Joo, K. K.
name: Kadenko, I.
name: Kahn, J.
name: Kakuno, H.
name: Kaliyar, A. B.
name: Kandra, J.
name: Kang, K. H.
name: Kapusta, P.
name: Karl, R.
name: Karyan, G.
name: Kato, Y.
name: Kawai, H.
name: Kawasaki, T.
name: Keck, T.
name: Ketter, C.
name: Kichimi, H.
name: Kiesling, C.
name: Kim, B. H.
name: Kim, C.-H.
name: Kim, D. Y.
name: Kim, H. J.
name: Kim, J. B.
name: Kim, K.-H.
name: Kim, K.
name: Kim, S.-H.
name: Kim, Y.-K.
name: Kim, Y.
name: Kimmel, T. D.
name: Kindo, H.
name: Kinoshita, K.
name: Kirby, B.
name: Kleinwort, C.
name: Knysh, B.
name: Kodyš, P.
name: Koga, T.
name: Kohani, S.
name: Komarov, I.
name: Konno, T.
name: Korpar, S.
name: Kovalchuk, N.
name: Kraetzschmar, T. M. G.
name: Križan, P.
name: Kroeger, R.
name: Krohn, J. F.
name: Krokovny, P.
name: Krüger, H.
name: Kuehn, W.
name: Kuhr, T.
name: Kumar, J.
name: Kumar, M.
name: Kumar, R.
name: Kumara, K.
name: Kumita, T.
name: Kunigo, T.
name: Künzel, M.
name: Kurz, Simon
name: Kuzmin, A.
name: Kvasnička, P.
name: Kwon, Y.-J.
name: Lacaprara, S.
name: Lai, Y.-T.
name: La Licata, C.
name: Lalwani, K.
name: Lanceri, L.
name: Lange, J. S.
name: Lautenbach, K.
name: Laycock, P. J.
name: Le Diberder, F. R.
name: Lee, I.-S.
name: Lee, S. C.
name: Leitl, P.
name: Levit, D.
name: Lewis, P. M.
name: Li, C.
name: Li, L. K.
name: Li, S. X.
name: Li, Y. M.
name: Li, Y. B.
name: Libby, J.
name: Lieret, K.
name: Li Gioi, L.
name: Lin, J.
name: Liptak, Z.
name: Liu, Q. Y.
name: Liu, Z. A.
name: Liventsev, D.
name: Longo, S.
name: Loos, A.
name: Lu, P.
name: Lubej, M.
name: Lueck, T.
name: Luetticke, F.
name: Luo, T.
name: Lyu, C.
name: MacQueen, C.
name: Maeda, Y.
name: Maggiora, M.
name: Maity, S.
name: Manfredi, R.
name: Manoni, E.
name: Marcello, S.
name: Marinas, C.
name: Martini, A.
name: Masuda, M.
name: Matsuda, T.
name: Matsuoka, K.
name: Matvienko, D.
name: McNeil, J.
name: Meggendorfer, F.
name: Mei, J. C.
name: Meier, F.
name: Merola, M.
name: Metzner, F.
name: Milesi, M.
name: Miller, C.
name: Miyabayashi, K.
name: Miyake, H.
name: Miyata, H.
name: Mizuk, R.
name: Azmi, K.
name: Mohanty, G. B.
name: Moon, H.
name: Moon, T.
name: Mora Grimaldo, J. A.
name: Morda, A.
name: Morii, T.
name: Moser, H.-G.
name: Mrvar, M.
name: Mueller, F.
name: Müller, F. J.
name: Muller, Th.
name: Muroyama, G.
name: Murphy, C.
name: Mussa, R.
name: Nakagiri, K.
name: Nakamura, I.
name: Nakamura, K. R.
name: Nakano, E.
name: Nakao, M.
name: Nakayama, H.
name: Nakazawa, H.
name: Nanut, T.
name: Natkaniec, Z.
name: Natochii, A.
name: Nayak, M.
name: Nazaryan, G.
name: Neverov, D.
name: Niebuhr, C.
name: Niiyama, M.
name: Ninkovic, J.
name: Nisar, N. K.
name: Nishida, S.
name: Nishimura, K.
name: Nishimura, M.
name: Nouxman, M. H. A.
name: Oberhof, B.
name: Ogawa, K.
name: Ogawa, S.
name: Olsen, S. L.
name: Onishchuk, Y.
name: Ono, H.
name: Onuki, Y.
name: Oskin, P.
name: Oxford, E. R.
name: Ozaki, H.
name: Pakhlov, P.
name: Pakhlova, G.
name: Paladino, A.
name: Pang, T.
name: Panta, A.
name: Paoloni, E.
name: Pardi, S.
name: Park, C.
name: Park, H.
name: Park, S.-H.
name: Paschen, B.
name: Passeri, A.
name: Pathak, A.
name: Patra, S.
name: Paul, S.
name: Pedlar, T. K.
name: Peruzzi, I.
name: Peschke, R.
name: Pestotnik, R.
name: Piccolo, M.
name: Piilonen, L. E.
name: Podesta-Lerma, P. L. M.
name: Polat, G.
name: Popov, V.
name: Praz, C.
name: Prencipe, E.
name: Prim, M. T.
name: Purohit, M. V.
name: Rad, N.
name: Rados, P.
name: Rasheed, R.
name: Reif, M.
name: Reiter, S.
name: Remnev, M.
name: Resmi, P. K.
name: Ripp-Baudot, I.
name: Ritter, M.
name: Ritzert, M.
name: Rizzo, G.
name: Rizzuto, L. B.
name: Robertson, S. H.
name: Pérez, D. Rodríguez
name: Roney, J. M.
name: Rosenfeld, C.
name: Rostomyan, A.
name: Rout, N.
name: Rozanska, M.
name: Russo, G.
name: Sahoo, D.
name: Sakai, Y.
name: Sanders, D. A.
name: Sandilya, S.
name: Sangal, A.
name: Santelj, L.
name: Sartori, P.
name: Sasaki, J.
name: Sato, Y.
name: Savinov, V.
name: Scavino, B.
name: Schram, M.
name: Schreeck, H.
name: Schueler, J.
name: Schwanda, C.
name: Schwartz, A. J.
name: Schwenker, B.
name: Seddon, R. M.
name: Seino, Y.
name: Selce, A.
name: Senyo, K.
name: Seong, I. S.
name: Serrano, J.
name: Sevior, M. E.
name: Sfienti, C.
name: Shebalin, V.
name: Shen, C. P.
name: Shibuya, H.
name: Shiu, J.-G.
name: Shwartz, B.
name: Sibidanov, A.
name: Simon, F.
name: Singh, J. B.
name: Skambraks, S.
name: Smith, K.
name: Sobie, R. J.
name: Soffer, A.
name: Sokolov, A.
name: Soloviev, Y.
name: Solovieva, E.
name: Spataro, S.
name: Spruck, B.
name: Starič, M.
name: Stefkova, S.
name: Stottler, Z. S.
name: Stroili, R.
name: Strube, J.
name: Stypula, J.
name: Sumihama, M.
name: Sumisawa, K.
name: Sumiyoshi, T.
name: Summers, D. J.
name: Sutcliffe, W.
name: Suzuki, K.
name: Suzuki, S. Y.
name: Svidras, H.
name: Tabata, M.
name: Takahashi, M.
name: Takizawa, M.
name: Tamponi, U.
name: Tanaka, S.
name: Tanida, K.
name: Tanigawa, H.
name: Taniguchi, N.
name: Tao, Y.
name: Taras, P.
name: Tenchini, F.
name: Tonelli, D.
name: Torassa, E.
name: Trabelsi, K.
name: Tsuboyama, T.
name: Tsuzuki, N.
name: Uchida, M.
name: Ueda, I.
name: Uehara, S.
name: Ueno, T.
name: Uglov, T.
name: Unger, K.
name: Unno, Y.
name: Uno, S.
name: Urquijo, P.
name: Ushiroda, Y.
name: Usov, Y.
name: Vahsen, S. E.
name: Van Tonder, R.
name: Varner, G. S.
name: Varvell, K. E.
name: Vinokurova, A.
name: Vitale, L.
name: Vorobyev, V.
name: Vossen, A.
name: Waheed, E.
name: Wakeling, H. M.
name: Wan, K.
name: Wan Abdullah, W.
name: Wang, B.
name: Wang, C. H.
name: Wang, M.-Z.
name: Wang, X. L.
name: Warburton, A.
name: Watanabe, M.
name: Watanuki, S.
name: Watson, I.
name: Webb, J.
name: Wehle, S.
name: Welsch, M.
name: Wessel, C.
name: Wiechczynski, J.
name: Wieduwilt, P.
name: Windel, H.
name: Won, E.
name: Wu, L. J.
name: Xu, X. P.
name: Yabsley, B.
name: Yamada, S.
name: Yan, W.
name: Yang, S. B.
name: Ye, Hua
name: Yelton, J.
name: Yeo, I.
name: Yin, J. H.
name: Yonenaga, M.
name: Yook, Y. M.
name: Yoshinobu, T.
name: Yuan, C. Z.
name: Yuan, G.
name: Yuan, W.
name: Yusa, Y.
name: Zani, L.
name: Zhang, J. Z.
name: Zhang, Y.
name: Zhang, Z.
name: Zhilich, V.
name: Zhou, Q. D.
name: Zhou, X. Y.
name: Zhukova, V. I.
name: Zhulanov, V.
name: Zupanc, A.
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2020

description: We report measurements of the $\bar{B}^0 \to D^{*+} \ell^{-} \bar{\nu}_l$ and $B^- \to D^{0} \ell^{-} \bar{\nu}_l$ processes using 34.6 fb$^{-1}$ of collision events recorded by the Belle II experiment at the SuperKEKB asymmetric-energy $e^+ e^-$ collider. For the $B^-\to D^{0}\ell^-\bar\nu_\ell$ channel, we present first studies that isolate this decay from other semileptonic processes and backgrounds. We report a measurement of the $\bar{B}^0 \to D^{*+} \ell^{-} \bar{\nu}_l$ branching fraction and obtain ${\cal B}(\bar{B}^0 \to D^{*+} \ell^{-} \bar{\nu}_l) = \left(4.60 \pm 0.05_{\mathrm{stat}}\pm0.17_{\mathrm{syst}} \pm 0.45_{\pi_s}\right) \%$, in agreement with the world average. Here, the uncertainties are statistical, systematic, and related to slow pion reconstruction, respectively. The systematic uncertainties are limited by the statistics of auxiliary measurements and will improve in the future. We also report differential branching fractions in five bins of the hadronic recoil parameter $w$ for $\bar{B}^0 \to D^{*+} \ell^{-} \bar{\nu}_l$, unfolded to account for resolution and efficiency effects.