Measurements of branching fractions and CP-violating charge asymmetries in multibody charmless $B$ decays reconstructed in 2019-2020 Belle II data
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, 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 ...
September 22, 2021
We report on measurements of branching fractions ($\mathcal{B}$) and CP-violating charge asymmetries ($\mathcal{A}_{\rm CP}$) of multibody charmless $B$ decays reconstructed by the Belle II experiment at the SuperKEKB electron-positron collider. We use a sample of collisions collected in 2019 and 2020 at the $\Upsilon(4S)$ resonance and corresponding to $62.8$ fb$^{-1}$ of integrated luminosity. We use simulation to determine optimized event selections. The $\Delta E$ and $M_{\rm bc}$ distributions of the resulting samples are fit to determine signal yields of approximately 690, 840, and 380 decays for the channels $B^+ \to K^+K^-K^+$, $B^+ \to K^+\pi^-\pi^+$, and $B^0 \to K^+\pi^-\pi^0$, respectively. These yields are corrected for efficiencies determined from simulation and control data samples to obtain $\mathcal{B}(B^+ \to K^+K^-K^+) = [35.8 \pm 1.6(\rm stat) \pm 1.4 (\rm syst)]\times 10^{-6}$, $\mathcal{B}(B^+ \to K^+\pi^-\pi^+) = [67.0 \pm 3.3 (\rm stat)\pm 2.3 (\rm syst)]\times 10^{-6}$, $\mathcal{B}(B^0 \to K^+\pi^-\pi^0) = [38.1 \pm 3.5 (\rm stat)\pm 3.9 (\rm syst)]\times 10^{-6}$, $\mathcal{A}_{\rm CP}(B^+ \to K^+K^-K^+) = -0.103 \pm 0.042(\rm stat) \pm 0.020 (\rm syst)$, $\mathcal{A}_{\rm CP}(B^+ \to K^+\pi^-\pi^+) = -0.010 \pm 0.050 (\rm stat)\pm 0.021(\rm syst)$, and $\mathcal{A}_{\rm CP}(B^0 \to K^+\pi^-\pi^0) = 0.207 \pm 0.088 (\rm stat)\pm 0.011(\rm syst)$. Results are consistent with previous measurements and demonstrate detector performance comparable with the best Belle results.
Duke Scholars
Publication Date
September 22, 2021
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collaboration, B. I. I., Abudinén, F., Adachi, I., Adak, R., Adamczyk, K., Ahlburg, P., … Varvell, K. E. (2021). Measurements of branching fractions and CP-violating charge asymmetries
in multibody charmless $B$ decays reconstructed in 2019-2020 Belle II data.
collaboration, Belle I. I., F. Abudinén, I. Adachi, R. Adak, K. Adamczyk, P. Ahlburg, J. K. Ahn, et al. “Measurements of branching fractions and CP-violating charge asymmetries
in multibody charmless $B$ decays reconstructed in 2019-2020 Belle II data,” September 22, 2021.
collaboration BII, Abudinén F, Adachi I, Adak R, Adamczyk K, Ahlburg P, et al. Measurements of branching fractions and CP-violating charge asymmetries
in multibody charmless $B$ decays reconstructed in 2019-2020 Belle II data. 2021 Sep 22;
collaboration, Belle I. I., et al. Measurements of branching fractions and CP-violating charge asymmetries
in multibody charmless $B$ decays reconstructed in 2019-2020 Belle II data. Sept. 2021.
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Pietro GD, Sangro RD, Deschamps B, Destefanis M, Dey S, Yta-Hernandez AD, Canto AD, Capua FD, Carlo SD, Dingfelder J, Dolež Z, Domí I, Dong TV, Dort K, Dossett D, Dubey S, Duell S, Dujany G, Eidelman S, Eliachevitch M, Epifanov D, Fast JE, Ferber T, Ferlewicz D, Fillinger T, 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, Gudkova K, Hadjivasiliou C, Halder S, Hara K, Hara T, Hartbrich O, Hayasaka K, Hayashii H, Hazra S, Hearty C, Hedges MT, Cruz IHDL, Herná M, Hershenhorn A, Higuchi T, Hill EC, Hirata H, Hoek M, Hohmann M, Hollitt S, Hotta T, Hsu C-L, Hu Y, Huang K, Humair T, 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, Junkerkalefeld H, 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 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, Korobov A, Korpar S, Kovalchuk N, Kovalenko E, Kraetzschmar TMG, Krinner F, Križ 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, Kü M, Kurz S, Kuzmin A, Kvasnič P, Kwon Y-J, Lacaprara S, Lai Y-T, Licata CL, Lalwani K, Lanceri L, Lange JS, Laurenza M, Lautenbach K, Laycock PJ, Diberder FRL, Lee I-S, Lee SC, Leitl P, Levit D, Lewis PM, Li C, Li LK, Li SX, 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, 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Measurements of branching fractions and CP-violating charge asymmetries
in multibody charmless $B$ decays reconstructed in 2019-2020 Belle II data. 2021 Sep 22;
Publication Date
September 22, 2021