Measurements of the absolute branching fractions of $B^{+}\to X_{c\bar{c}}{K}^{+}$ and $B^{+}\to {\bar{D}}^{(\ast )0}{\pi }^{+}$ at Belle

Abstract

We present the measurement of the absolute branching fractions of $B^{+}\to X_{c\bar{c}}{K}^{+}$ and $B^{+}\to {\bar{D}}^{(\ast )0}{\pi }^{+}$ decays, using a data sample of $772\times 10^6$ $B\bar{B}$ pairs collected at the ${\rm Y}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. Here, $X_{c\bar{c}}$ denotes ${\eta }_c$, $J/\psi$, ${\chi }_{c0}$, ${\chi }_{c1}$, ${\eta }_c(2S)$, $\psi (2S)$, $\psi (3770)$, $X(3872)$, and $X(3915)$. We do not observe significant signals for $X(3872)$ nor $X(3915)$, and set the 90$\%$ confidence level upper limits: $\mathcal{B}(B^{+}\to X(3872)K^{+})<2.7\times 10^{-4}$ and $\mathcal{B}(B^{+}\to X(3915)K^{+})<2.9\times 10^{-4}$. These represent the most stringent upper limit for $\mathcal{B}(B^{+}\to X(3872)K^{+})$ to date and the first measurement for $\mathcal{B}(B^{+}\to X(3915)K^{+})$. The measured branching fractions for ${\eta }_c$ and ${\eta }_c(2S)$ are the most precise to date: $\mathcal{B}(B^{+}\to {\eta }_c{K}^{+})=(12.3\pm 0.8\pm 0.7)\times 10^{-4}$ and $\mathcal{B}(B^{+}\to {\eta }_c(2S)K^{+})=(4.9\pm 1.1\pm 0.3)\times 10^{-4}$ , where the first and second uncertainties are statistical and systematic, respectively.

arXiv comment10 pages, 3 figures

References in corpus (14)

• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Determination of the X(3872) meson quantum numbers
• Analysis of the Quantum Numbers $J^{PC}$ of the X(3872) Particle
• Evidence for X(3872) --> psi(2S) gamma in B+/- --> X(3872) K+/- decays, and a study of B --> ccbar gamma K
• Evidence for B- -> tau- nu_tau-bar with a Hadronic Tagging Method Using the Full Data Sample of Belle
• Evidence for the decay $X(3872)\to \psi (2S)\gamma$
• Study of Exclusive B->X_u l nu Decays and Extraction of |V_{ub}| using Full Reconstruction Tagging at the Belle Experiment
• A Hierarchical NeuroBayes-based Algorithm for Full Reconstruction of B Mesons at B Factories
• X(3872) as a hybrid state of the charmonium and the hadronic molecule
• Observation of ${\eta }_c(2S)\to p\bar{p}$ and search for $X(3872)\to p\bar{p}$ decays
• QCD Sum Rules for the production of the X(3872) as a mixed molecule-charmonium state in B meson decay
• Inclusive and exclusive measurements of $B$ decays to ${\chi }_{c1}$ and ${\chi }_{c2}$ at Belle
• Search for a Charmonium Assignment for the X(3872)

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