Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-11-04
Phys.Lett.B699:341-344,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 4 figures. Accepted for publication by Phys. Lett. B
Scientific paper
10.1016/j.physletb.2011.04.024
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 $D_s\bar{D}_{s0}(2317)+h.c.$ 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 $D\bar{D}_{0}(2400)+h.c.$ 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.
Liu Xiang
Luo Zhi-Gang
Zhu Shi-Lin
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