Measurements of the Absolute Branching Fractions of <i>B</i><SUP>±</SUP> → <i>K</i><SUP>±</SUP><i>Xc</i>(<i>c</i>)over-bar

Lees, JP, Poireau, V, Tisserand, V, Grauges, E, Palano, A, Eigen, G, Brown, DN, Kolomensky, Yu G, Fritsch, M, Koch, H
et al (show 228 more authors) (2020) Measurements of the Absolute Branching Fractions of <i>B</i><SUP>±</SUP> → <i>K</i><SUP>±</SUP><i>Xc</i>(<i>c</i>)over-bar. PHYSICAL REVIEW LETTERS, 124 (15). 152001-.

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A study of the two-body decays B^{±}→X_{cc[over ¯]}K^{±}, where X_{cc[over ¯]} refers to one charmonium state, is reported by the BABAR Collaboration using a data sample of 424  fb^{-1}. The absolute determination of branching fractions for these decays are significantly improved compared to previous BABAR measurements. Evidence is found for the decay B^{+}→X(3872)K^{+} at the 3σ level. The absolute branching fraction B[B^{+}→X(3872)K^{+}]=[2.1±0.6(stat)±0.3(syst)]×10^{-4} is measured for the first time. It follows that B[X(3872)→J/ψπ^{+}π^{-}]=(4.1±1.3)%, supporting the hypothesis of a molecular component for this resonance.

Item Type: Article
Uncontrolled Keywords: <span class="sc"><i>BaBar</i></span> Collaboration
Depositing User: Symplectic Admin
Date Deposited: 05 May 2020 15:52
Last Modified: 11 Oct 2023 16:58
DOI: 10.1103/PhysRevLett.124.152001
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