Analysis of the Y(4140) with QCD sum rules

In this article, we assume that there exists a scalar Ds* anti Ds* molecular state in the J/ψ φ invariant mass distribution, and we study its mass using the QCD sum rules. The predictions depend heavily on the two criteria (pole dominance and convergence of the operator product expansion) of the QCD sum rules. The value of the mass is about MDs*antiDs*=(4.43±0.16) GeV, which is inconsistent with the experimental data. The Ds* anti Ds* is probably a virtual state and is not related to the meson Y(4140). Another possibility, such as a hybrid charmonium, is not excluded. (orig.)