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Hadronic and radiative $D^*$ decays
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abstract
A recent measurement of the total $D^{*+}$ width, $\Gamma_{\rm tot}(D^{*+}) = (83.3 \pm 1.3 \pm 1.4)$ keV, is shown to be close to earlier predictions based on the single-quark-transition hypothesis. Those predictions are updated using more recent masses and branching fractions to a value of 80.4 keV, with a small uncertainty associated with the radiative branching fractions of $D^{*0}$ and $D^{*+}$. A prediction for the total width of $D_2(2460)$ and its partial width into $D^* \pi$ and $D \pi$ is also updated, and found to be in agreement with experiment.
Forward citations
Cited by 3 Pith papers
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Production of $X(3872)$ and a Photon in $e^+e^-$ Annihilation
If X(3872) is a charm-meson molecule, e+e- -> X gamma has a narrow triangle-singularity peak at 2.2 MeV above the D*0 Dbar*0 threshold, with a peak cross section near 0.5 pb.
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Branching Fractions of the $X(3872)$
If the X(3872) is a weakly bound charm-meson molecule, its J/psi pi+ pi- branching fraction lies between roughly 4% and 33%, and is likely several times larger than the measured resonance-feature fraction.
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Nonexistence of hidden-charm pentaquarks in $J/\psi$ photoproduction
Hidden-charm pentaquarks do not appear in J/ψ photoproduction because rescattering from ar{D}^{(*)}Σ_c intermediate states is suppressed relative to ar{D}^{(*)}Λ_c by a factor of roughly five in the relevant couplings.
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