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Evidence for X(3872)-->gamma J/psi and the sub-threshold decay X(3872)-->omega J/psi
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Evidence for X(3872)-->gamma J/psi and the sub-threshold decay X(3872)-->omega J/psi
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We report evidence for the decay modes X(3872) --> gamma J/psi and X(3872)--> pi+pi-pi0 J/psip. In the latter, the pi+pi-pi0 invariant mass distribution has a strong peak between 750 MeV and the kinematic limit of 775 MeV, suggesting that the process is dominated by the sub-threshold decay X --> omega J/psi. These results establish the charge-conjugation parity of the X(3872) as C=+1. The results are based on a study of X(3872) mesons produced via exclusive B --> K X(3872) decays in a 256 fb-1 data sample collected at the Upsilon(4S) resonance in the Belle detector at the KEKB collider. The X(3872) --> gamma J/psi signal and the pi+pi-pi0 J/psi signal each has a statistical significance that is greater than 4 sigma.
Forward citations
Cited by 2 Pith papers
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Study of exotic hadron states in the $DD^{*}$ system via the complex momentum representation and Green's function method
The CMR method combined with Green's functions provides a unified description of DD* exotic hadron states, identifying G(3900) as a P-wave resonance and extracting its scattering phase shifts and cross sections.
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Probing the structure of $\chi_{c1}(3872)$: Heavy quark symmetries at work
Heavy-quark large-mass limit applied to E1 transitions of χ_c1(2P) yields decay rates that match LHCb measurements for χ_c1(3872) under the 2P assignment.
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