ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2010, vol. 104, p. -
Observation of a charmoniumlike enhancement in the γγ→ ωJ/ψ Process
We report the results of a search for a charmoniumlike state produced in the process γγ→ωJ/ψ in the 3.9-4.2GeV/c2 mass region. We observe a significant enhancement, which is well described by a resonant shape with mass M=(3915±3±2)MeV/c2 and total width Γ=(17±10±3)MeV. This enhancement may be related to one or more of the three charmoniumlike states so far reported in the 3.90-3.95GeV/c2 mass region. © 2010 The American Physical Society.