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arXiv 1208.6474hep-phnucl-th
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赝标胶球衰变为标量和赝标介子

Decay of the pseudoscalar glueball into scalar and pseudoscalar mesons

Walaa I. Eshraim, Stanislaus Janowski, Francesco Giacosa, Dirk H. Rischke

摘要:

我们研究了手征拉格朗日量,它描述了一个赝标胶球到标量和赝标介子的两体和三体衰变。各种分支比是我们的方法的无参数预测。我们计算了质量为2.6 GeV的赝标胶球的衰变通道,正如格点量子色动力学在淬灭近似下预测的那样,这是在即将到来的FAIR设施的PANDA实验范围内。为了完整起见,我们还重复计算了2.37 GeV的胶球质量,这对应于BESIII实验中测量的共振X(2370)的质量。

英文摘要:

We study a chiral Lagrangian which describes the two- and three-body decays of a pseudoscalar glueball into scalar and pseudoscalar mesons. The various branching ratios are a parameter-free prediction of our approach. We compute the decay channels for a pseudoscalar glueball with a mass of 2.6 GeV, as predicted by Lattice QCD in the quenched approximation, which is in the reach of the PANDA experiment at the upcoming FAIR facility. For completeness, we also repeat the calculation for a glueball mass of 2.37 GeV which corresponds to the mass of the resonance X(2370) measured in the BESIII experiment.

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