Novel charmonium-like structures in the J/ψφ and J/ψφ invariant mass spectra

Stimulated by the new evidence of Y(4274) observed in the j/psi phi invariant mass spectrum, we first propose the charmonium-like state Y(4274) as the S-wave D(s)(D) over bar (s0)(2317) + h.c. molecular state with J(P) = 0(-), which is supported well by dynamics study of the system composed of the pseudoscalar and scalar charmed mesons. The S-wave D (D) over bar (0)(2400) + h.c. molecular charmonium appears as the molecular partner of Y(4274), which is in accord with the enhancement structure appearing at 4.2 GeV in the J/psi omega, invariant mass spectrum from B. decays. Our study shows that the enhancement structures, i.e., the newly observed Y(4274) and the previously announced Y(4140)/Y(3930) in the J/psi phi and J/psi omega invariant mass spectra, can be understood well under the uniform framework of the molecular charmonium, which can be tested by future experiments. (C) 2011 Elsevier B.V. All rights reserved.