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

In order to solve the current experimental controversy on the existence of the tensor glueball ξ(2230), we examine 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 existence of ξ(2230) but it may just indicate that ξ(2230) has a broad width. We also study the tensor glueball properties: the mass, spin, and decay width. Our theoretical predictions of the mass and the spin of the ξ(2230) using QCD sum rule are about 2.23 GeV and J = 2, respectively. Our theoretical results also evidently show that the ξ(2230) must have a total decay width of about 100 MeV, which is much broader than the reported 20 MeV but a small partial decay width of 2 MeV into pp decay channel.

作 者： MA Wei-Xing HU Zhao-hui ZHOU Li-Juan   作者單位： MA Wei-Xing(Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China;Department of Information and Computing Science, Guangxi University of Technology, Liuzhou 545006, China;Institute of High Energy Physics)

HU Zhao-hui(Department of Information and Computing Science, Guangxi University of Technology, Liuzhou 545006, China)

ZHOU Li-Juan(Department of Information and Computing Science, Guangxi University of Technology, Liuzhou 545006, China;Department of Physics, Guangxi University, Nanning 540003, China) 

刊 名： 理論物理通訊（英文版）  ISTIC SCI 英文刊名： COMMUNICATIONS IN THEORETICAL PHYSICS  年，卷(期)： 2005 43(3)  分類號：   關鍵詞： tensor glueball ξ(2230)   QCD   QCD sum rule   properties of ξ(2230)  

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