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Observation of a charmonium-like enhancement in the gamma gamma --> omega J/psi process

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arxiv 0912.4451 v2 pith:OSI44LIM submitted 2009-12-22 hep-ex

Observation of a charmonium-like enhancement in the gamma gamma --> omega J/psi process

classification hep-ex
keywords gammacharmonium-likeenhancementmassomegaprocessregionobservation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report the results of a search for a charmonium-like state produced in the process gamma gamma --> omega J/psi in the 3.9-4.2 GeV/c^2 mass region. We observe a significant enhancement, which is well-described by a resonant shape with mass M = (3915 +/- 3 +/- 2) MeV/c^2 and total width Gamma = (17 +/- 10 +/- 3) MeV. This enhancement may be related to one or more of the three charmonium-like states so far reported in the 3.90-3.95 GeV/c^2 mass region.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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  2. Unquenched Charmonium and Beyond

    hep-ph 2026-02 conditional novelty 2.0

    This Lanzhou-group review argues that coupled-channel (unquenched) effects, not exotic constituents, are the common thread explaining charmonium anomalies from the rho-pi puzzle to the Y-problem states.