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Measurements of the absolute branching fractions of B <sup>+</sup> → X <inf>cc̄</inf> K <sup>+</sup> and B <sup>+</sup> → D̄ <sup>(*)0</sup> π <sup>+</sup> at Belle

Kato Y., Iijima T., Adachi I., Aihara H., Al Said S., Asner D. M., Aulchenko V., Aushev T., Ayad R., Babu V., Badhrees I., Bakich A. M., Bansal V., Barberio E., Behera P., Bhardwaj V., Bhuyan B., Biswal J., Bozek A., Bračko M., Browder T. E., Červenkov D., Chang P., Cheaib R., Chekelian V., Chen A., Cheon B. G., Chilikin K., Cho K., Choi S. K., Choi Y., Cinabro D., Czank T., Dash N., Di Carlo S., DoleŽal Z., Drásal Z., Dutta D., Eidelman S., Epifanov D., Fast J. E., Ferber T., Fulsom B. G., Gaur V., Gabyshev N., Garmash A., Gelb M., Goldenzweig P., Greenwald D., Guido E., Haba J., Hayasaka K., Hayashii H., Hedges M. T., Hirose S., Hou W. S., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jaegle I., Jeon H. B., Jin Y., Joo K. K., Julius T., Kaliyar A. B., Kang K. H., Karyan G., Kawasaki T., Kichimi H., Kiesling C., Kim D. Y., Kim J. B., Kim S. H., Kim Y. J., Kinoshita K., Kodyš P., Korpar S., Kotchetkov D., KriŽan P., Kroeger R., Krokovny P., Kuhr T., Kulasiri R., Kuzmin A., Kwon Y. J., Lange J. S., Lee I. S., Li C. H., Li L., Li Gioi L., Libby J., Liventsev D., Lubej M., Luo T., Masuda M., Matsuda T.

© 2018 authors. Published by the American Physical Society. We present the measurement of the absolute branching fractions of B+→Xcc̄K+ and B+→D̄(∗)0π+ decays, using a data sample of 772×106 BB̄ pairs collected at the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. Here, Xcc̄ denotes ηc, J/ψ, χc0, χc1, ηc(2S), ψ(2S), ψ(3770), X(3872), and X(3915). We do not observe significant signals for X(3872) or X(3915) and set the 90% confidence level upper limits at B(B+→X(3872)K+)<2.6×10-4 and B(B+→X(3915)K+)<2.8×10-4. These represent the most stringent upper limit for B(B+→X(3872)K+) to date and the first limit for B(B+→X(3915)K+). The measured branching fractions for ηc and ηc(2S) are the most precise to date, B(B+→ηcK+)=(12.0±0.8±0.7)×10-4 and B(B+→ηc(2S)K+)=(4.8±1.1±0.3)×10-4, where the first and second uncertainties are statistical and systematic, respectively.