Analysis of the Y(4140) with QCD sum rules

Details Analysis of the Y(4140) with QCD sum rules Analysis of the Y(4140) with QCD sum rules

2009-03-30

arxiv.org/abs/0903.5200v4

Eur.Phys.J.C63:115-122,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 11 figures, 3 revision, correct two writing errors

Scientific paper

10.1140/epjc/s10052-009-1097-9

In this article, we assume that there exists a scalar $D_s^\ast {\bar D}_s^\ast$ molecular state in the $J/\psi \phi$ invariant mass distribution, and 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 $M_{D_s^\ast {\bar D}_s^\ast}=(4.43\pm0.16) \rm{GeV}$, which is inconsistent with the experimental data. The $D_s^\ast {\bar D}_s^\ast$ is probably a virtual state and not related to the meson Y(4140). Other possibility, such as a hybrid charmonium is not excluded.

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