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arXiv 1606.02207hep-ph
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受激赝标胶球的衰变模

Decay modes of the excited pseudoscalar glueball

Walaa I. Eshraim, Stefan Schramm

摘要:

我们研究了三种不同的手征拉格朗日量,它们描述了一个受激的赝标胶球$J^{PC}=0^{*-+}$的二体和三体衰变,成为轻介子和粲偶素态,以及成为一个标量和赝标胶球。根据格点量子色动力学模拟的预测,我们计算了质量为$3.7$ GeV的激发态赝标胶球的衰变通道,并考虑了质量为$2.6$ GeV的基态赝标胶球.正在进行的BESIII实验和即将到来的FAIR设施实验中的PANDA实验都可以达到这些状态和通道。我们提出了由此产生的衰变分支比的参数自由预测。

英文摘要:

We study three different chiral Lagrangians that describe the two- and three-body decays of an excited pseudoscalar glueball, $J^{PC}=0^{*-+}$, into light mesons and charmonium states as well as into a scalar and pseudoscalar glueball. We compute the decay channels for an excited pseudoscalar glueball with a mass of $3.7$ GeV and consider a ground state pseudoscalar glueball of mass $2.6$ GeV, following predictions from lattice QCD simulations. These states and channels are in reach of the ongoing BESIII experiment and the PANDA experiments at the upcoming FAIR facility experiment. We present the resulting decay branching ratios with a parameter-free prediction.

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