title: Observation of a charmoniumlike enhancement in the gammagamma-->omega(J)/psi process.
abstract: We report the results of a search for a charmoniumlike state produced in the process gammagamma-->omegaJ/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 charmoniumlike states so far reported in the 3.90-3.95 GeV/c{2} mass region.
authors.affiliation: High Energy Accelerator Research Organization (KEK), Tsukuba.
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