Institute: MPI für Physik     Collection: YB 2016     Display Documents

ID: 716467.0, MPI für Physik / YB 2016
Observation of $X(3872)$ in $B \\to X(3872) K\\pi$ decays
Authors:
Date of Publication (YYYY-MM-DD):2015
Title of Journal:Physical Review D
Journal Abbrev.:Phys.Rev.D
Issue / Number:91
Start Page:051101
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:We report the first observation of $B^0 \\to X(3872) (K^{+}\\pi^{-})$ and evidence for $B^+ \\to X(3872) (K^{0}\\pi^{+})$. We measure the product of branching fractions for the former to be ${\\cal B}(B^0 \\to X(3872) (K^+ \\pi^-)) \\times {\\cal B}(X(3872) \\to J/\\psi \\pi^+ \\pi^-) = (7.9 \\pm 1.3(\\mbox{stat.})\\pm 0.4(\\mbox{syst.})) \\times 10^{-6}$ and find that $B^{0}\\to X(3872) K^{*}(892)^{0}$ does not dominate the $B^{0}\\to X(3872)K^{+}\\pi^{-}$ decay mode. We also measure ${\\cal B}(B^+ \\to X(3872) (K^0 \\pi^+)) \\times {\\cal B}(X(3872) \\to J/\\psi \\pi^+ \\pi^-) = (10.6 \\pm 3.0(\\mbox{stat.}) \\pm 0.9(\\mbox{syst.})) \\times 10^{-6}$. This study is based on the full data sample of 711~fb$^{-1}$ ($772\\times 10^6 B\\bar B$ pairs) collected at the $\\Upsilon(4S)$ resonance with the Belle detector at the KEKB collider.
Classification / Thesaurus:Belle II
Comment of the Author/Creator:7 pages, 3 figures
External Publication Status:published
Document Type:Article
Communicated by:MPI für Physik
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