Abstract
Using the QCD sum rules approach, we study the mass and the decay widths of the state, assuming that it can be described by a mixed charmonium-molecule scalar state, i.e., a mixture between the charmonium and molecule. Using a current with , we estimate for the mixing angle, , resulting in a mass value of , which is in reasonable agreement with the experimental mass of the state. For the decay width, we evaluate the channels and . We find the values and , respectively. We also study the decay process of this state into channels containing mesons in the final state. The result for the order of magnitude of the product is also in reasonable agreement with the experimental data. We thus conclude that the present description of the as a mixed charmonium-molecule state is a possible scenario to explain the structure of such a state.
- Received 27 November 2013
DOI:https://doi.org/10.1103/PhysRevD.89.076007
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