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Existence of Tensor Glueball ξ(2230)and Its Mass,Spin,and Decay Width

【摘要】:正 In order to solve the current experimental controversy on the existence of the tensor glueball ξ(2230),weexamine whether the conclusion from Seth's experimental measurement,which rejects existence of ξ(2230),is reliable.We claim that the non-observation of the resonance structure by Seth is not a sound ground for rejecting the existenceof ξ(2230)but it,may just indicate that ξ(2230)has a broad width.We also study the tensor glueball properties:themass,spin,and decay width.Our theoretical predictions of the mass and the spin of the ξ(2230)using QCD sum ruleare about 2.23 GeV and .J=2,respectively.Our theoretical results also evidently show that the ξ(2230)must have atotal decay width of about 100 MeV,which is much broader than the reported 20 MeV but a small partial decay widthof 2 MeV into p decay channel.

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