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A study of B->X(3872) K, with X(3872)->J/Psi pi+ pi-

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arxiv 0803.2838 v1 pith:N5G3RL4B submitted 2008-03-19 hep-ex

The BABAR Collaboration , B. Aubert , et al This is my paper · ORCID
classification hep-ex
keywords jpsimeasurementsasymmetric-energybabarbbbarbranchingcollectedconfidence
verification ladder T0 review T1 audit T2 compute T3 formal
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We present measurements of the decays B+ -> X(3872) K+ and B0 -> X(3872) K0 with X(3872) -> Jpsi pi+ pi-. The data sample used, collected with the BABAR detector at the PEP-II e+e- asymmetric-energy storage ring, corresponds to 455 x 10^6 BBbar pairs. Branching fraction measurements of BF(B+ -> X(3872) K+) x BF(X(3872) -> Jpsi pi+ pi-) = (8.4 +/- 1.5 +/- 0.7) x 10^{-6} and BF(B0 -> X(3872) K0) x BF(X(3872) -> Jpsi pi+ pi- = (3.5 +/- 1.9 +/- 0.4) x 10^{-6} are obtained. We set an upper limit on the natural width of the X(3872) of Gamma < 3.3 MeV/c^2 at the 90% confidence level.

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Cited by 2 Pith papers

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  1. Observation of the decay $\chi_{c1}(3872)\rightarrow J\mskip -3mu/\mskip -2mu\psi \mu^+\mu^-$

    hep-ex 2026-01 accept novelty 7.0 of 10

    First observation of χ_c1(3872) → J/ψ μ⁺μ⁻ reported at 6.5σ significance with branching fraction ratio (1.68 ± 0.37) × 10^{-3} relative to the π⁺π⁻ mode.

  2. Radiative decay of $\chi_{c1}$ states in effective Lagrangian approach

    hep-ph 2025-06 conditional novelty 4.0 of 10

    A triangle-loop effective Lagrangian model predicts chi_c1(3872) radiative branching fractions tens of times above LHCb measurements, supporting a non-charmonium interpretation.

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