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Studies of the semileptonic $\bar B^0\to D^{*+}\ell^-\barν_\ell$ and $B^-\to D^{0}\ell^-\barν_\ell$ decay processes with 34.6 fb$^{-1}$ of Belle II data

Publication ,  Journal Article
Collaboration, BII; Abudinén, F; Adachi, I; Adak, R; Adamczyk, K; Ahlburg, P; Ahn, JK; Aihara, H; Akopov, N; Aloisio, A; Ameli, F; Andricek, L ...
August 17, 2020

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.

Duke Scholars

Publication Date

August 17, 2020
 

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Collaboration, B. I. I., Abudinén, F., Adachi, I., Adak, R., Adamczyk, K., Ahlburg, P., … Wakeling, H. M. (2020). Studies of the semileptonic $\bar B^0\to D^{*+}\ell^-\barν_\ell$ and $B^-\to D^{0}\ell^-\barν_\ell$ decay processes with 34.6 fb$^{-1}$ of Belle II data.
Collaboration, Belle I. I., F. Abudinén, I. Adachi, R. Adak, K. Adamczyk, P. Ahlburg, J. K. Ahn, et al. “Studies of the semileptonic $\bar B^0\to D^{*+}\ell^-\barν_\ell$ and $B^-\to D^{0}\ell^-\barν_\ell$ decay processes with 34.6 fb$^{-1}$ of Belle II data,” August 17, 2020.
Collaboration BII, Abudinén F, Adachi I, Adak R, Adamczyk K, Ahlburg P, Ahn JK, Aihara H, Akopov N, Aloisio A, Ameli F, Andricek L, Ky NA, Asner DM, Atmacan H, Aulchenko V, Aushev T, Aushev V, Aziz T, Babu V, Bacher S, Baehr S, Bahinipati S, Bakich AM, Bambade P, Banerjee S, Bansal S, Barrett M, Batignani G, Baudot J, Beaulieu A, Becker J, Behera PK, Bender M, Bennett JV, Bernieri E, Bernlochner FU, Bertemes M, Bessner M, Bettarini S, Bhardwaj V, Bhuyan B, Bianchi F, Bilka T, Bilokin S, Biswas D, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bračko M, Branchini P, Braun N, Briere RA, Browder TE, Brown DN, Budano A, Burmistrov L, Bussino S, Calò S, Campajola M, Cao L, Caria G, Casarosa G, Cecchi C, Červenkov D, Chang M-C, Chang P, Cheaib R, Chekelian V, Chen C, Chen YQ, Chen Y-T, Cheon BG, Chilikin K, Chirapatpimol K, Cho H-E, Cho K, Cho S-J, Choi S-K, Choudhury S, Cinabro D, Corona L, Cremaldi LM, Cuesta D, Cunliffe S, Czank T, Dash N, Dattola F, Cruz-Burelo EDL, Nardo GD, Nuccio MD, Pietro GD, Sangro RD, Deschamps B, Destefanis M, Dey S, Yta-Hernandez AD, Canto AD, Capua FD, Carlo SD, Dingfelder J, Doležal Z, Jiménez ID, Dong TV, Dort K, Dossett D, Dubey S, Duell S, Dujany G, Eidelman S, Eliachevitch M, Epifanov D, Fast JE, Ferber T, Ferlewicz D, Finocchiaro G, Fiore S, Fischer P, Fodor A, Forti F, Frey A, Friedl M, Fulsom BG, Gabriel M, Gabyshev N, Ganiev E, Garcia-Hernandez M, Garg R, Garmash A, Gaur V, Gaz A, Gebauer U, Gelb M, Gellrich A, Gemmler J, Geßler T, Getzkow D, Giordano R, Giri A, Glazov A, Gobbo B, Godang R, Goldenzweig P, Golob B, Gomis P, Grace P, Gradl W, Graziani E, Greenwald D, Guan Y, Hadjivasiliou C, Halder S, Hara K, Hara T, Hartbrich O, Hauth T, Hayasaka K, Hayashii H, Hearty C, Heck M, Hedges MT, Cruz IHDL, Villanueva MH, Hershenhorn A, Higuchi T, Hill EC, Hirata H, Hoek M, Hohmann M, Hollitt S, Hotta T, Hsu C-L, Hu Y, Huang K, Iijima T, Inami K, Inguglia G, Jabbar JI, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Iwata S, Jackson P, Jacobs WW, Jaegle I, Jaffe DE, Jang E-J, Jeandron M, Jeon HB, Jia S, Jin Y, Joo C, Joo KK, Kadenko I, Kahn J, Kakuno H, Kaliyar AB, Kandra J, Kang KH, Kapusta P, Karl R, Karyan G, Kato Y, Kawai H, Kawasaki T, Keck T, Ketter C, Kichimi H, Kiesling C, Kim BH, Kim C-H, Kim DY, Kim HJ, Kim JB, Kim K-H, Kim K, Kim S-H, Kim Y-K, Kim Y, Kimmel TD, Kindo H, Kinoshita K, Kirby B, Kleinwort C, Knysh B, Kodyš P, Koga T, Kohani S, Komarov I, Konno T, Korpar S, Kovalchuk N, Kraetzschmar TMG, Križan P, Kroeger R, Krohn JF, Krokovny P, Krüger H, Kuehn W, Kuhr T, Kumar J, Kumar M, Kumar R, Kumara K, Kumita T, Kunigo T, Künzel M, Kurz S, Kuzmin A, Kvasnička P, Kwon Y-J, Lacaprara S, Lai Y-T, Licata CL, Lalwani K, Lanceri L, Lange JS, Lautenbach K, Laycock PJ, Diberder FRL, Lee I-S, Lee SC, Leitl P, Levit D, Lewis PM, Li C, Li LK, Li SX, Li YM, Li YB, Libby J, Lieret K, Gioi LL, Lin J, Liptak Z, Liu QY, Liu ZA, Liventsev D, Longo S, Loos A, Lu P, Lubej M, Lueck T, Luetticke F, Luo T, Lyu C, MacQueen C, Maeda Y, Maggiora M, Maity S, Manfredi R, Manoni E, Marcello S, Marinas C, Martini A, Masuda M, Matsuda T, Matsuoka K, Matvienko D, McNeil J, Meggendorfer F, Mei JC, Meier F, Merola M, Metzner F, Milesi M, Miller C, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Azmi K, Mohanty GB, Moon H, Moon T, Grimaldo JAM, Morda A, Morii T, Moser H-G, Mrvar M, Mueller F, Müller FJ, Muller T, Muroyama G, Murphy C, Mussa R, Nakagiri K, Nakamura I, Nakamura KR, Nakano E, Nakao M, Nakayama H, Nakazawa H, Nanut T, Natkaniec Z, Natochii A, Nayak M, Nazaryan G, Neverov D, Niebuhr C, Niiyama M, Ninkovic J, Nisar NK, Nishida S, Nishimura K, Nishimura M, Nouxman MHA, Oberhof B, Ogawa K, Ogawa S, Olsen SL, Onishchuk Y, Ono H, Onuki Y, Oskin P, Oxford ER, Ozaki H, Pakhlov P, Pakhlova G, Paladino A, Pang T, Panta A, Paoloni E, Pardi S, Park C, Park H, Park S-H, Paschen B, Passeri A, Pathak A, Patra S, Paul S, Pedlar TK, Peruzzi I, Peschke R, Pestotnik R, Piccolo M, Piilonen LE, Podesta-Lerma PLM, Polat G, Popov V, Praz C, 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Trabelsi K, Tsuboyama T, Tsuzuki N, Uchida M, Ueda I, Uehara S, Ueno T, Uglov T, Unger K, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Vahsen SE, Tonder RV, Varner GS, Varvell KE, Vinokurova A, Vitale L, Vorobyev V, Vossen A, Waheed E, Wakeling HM. Studies of the semileptonic $\bar B^0\to D^{*+}\ell^-\barν_\ell$ and $B^-\to D^{0}\ell^-\barν_\ell$ decay processes with 34.6 fb$^{-1}$ of Belle II data. 2020 Aug 17;

Publication Date

August 17, 2020