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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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arxiv hep-ex/0505037 v1 pith:U7MKWDWB submitted 2005-05-14 hep-ex

Evidence for X(3872)-->gamma J/psi and the sub-threshold decay X(3872)-->omega J/psi

classification hep-ex
keywords decaygammapi-pi0evidenceomegaresultssignalsub-threshold
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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Cited by 2 Pith papers

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  1. Study of exotic hadron states in the $DD^{*}$ system via the complex momentum representation and Green's function method

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    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.

  2. Probing the structure of $\chi_{c1}(3872)$: Heavy quark symmetries at work

    hep-ph 2026-06 unverdicted novelty 4.0

    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.