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首页> 外文期刊>Physical review, D >Measurements of the absolute branching fractions of B~+ → X_(cc)K~+ and B~+ → D~((*)0)π~+ at Belle
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Measurements of the absolute branching fractions of B~+ → X_(cc)K~+ and B~+ → D~((*)0)π~+ at Belle

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摘要

We present the measurement of the absolute branching fractions of B~+ → X_(cc)K~+ and B~+ → D~((*)0)π~+ decays, using a data sample of 772 × 10~6 BB pairs collected at the ?(4S) resonance with the Belle detector at the KEKB asymmetric-energy e~+e~? collider. Here, X_(cc) denotes η_c, J/ψ, χ_(c0), χ_(c1), η_c(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 η_c and η_c(2S) are the most precise to date, B(B~+ → η_cK~+) = (12.0 ± 0.8 ± 0.7) × 10~(?4) and B(B~+ → η_c(2S)K~+) = (4.8 ± 1.1 ± 0.3) × 10~(?4), where the first and second uncertainties are statistical and systematic, respectively.

著录项

  • 来源
    《Physical review, D》 |2018年第1期|012005-1-012005-10|共10页
  • 作者单位

    Tata Institute of Fundamental Research, Mumbai 400005;

    Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451;

    School of Physics, University of Sydney, New South Wales 2006Pacific Northwest National Laboratory, Richland, Washington 99352School of Physics, University of Melbourne, Victoria 3010Indian Institute of Technology Madras, Chennai 600036Indian Institute of Science Education and Research Mohali, SAS Nagar, 140306Indian Institute of Technology Guwahati, Assam 781039J. Stefan Institute, 1000 LjubljanaH. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342University of Maribor, 2000 MariborUniversity of Hawaii, Honolulu, Hawaii 96822Faculty of Mathematics and Physics, Charles University, 121 16 PragueDepartment of Physics, National Taiwan University, Taipei 10617University of Mississippi, University, Mississippi 38677Max-Planck-Institut für Physik, 80805 MünchenKobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801Department of Physics, University of Tokyo, Tokyo 113-0033Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090Moscow Institute of Physics and Technology, Moscow Region 141700;

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  • 原文格式 PDF
  • 正文语种 英语
  • 中图分类 粒子物理学;场论;
  • 关键词

    Measurements; branching; fractions;

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