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arXiv 1010.2293hep-phhep-exnucl-exnucl-th
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$1^{-+}$奇异混合介子的强衰变模式

The Strong Decay Patterns of the $1^{-+}$ Exotic Hybrid Mesons

Peng-Zhi Huang, Hua-Xing Chen, Shi-Lin Zhu

摘要:

我们在光锥QCD求和规则的框架下计算了衰变模$1^{-+}\rightarrowρπ, f_1π, b_1π, ηπ, η'π, a_1π, f_1η$的耦合常数。然后,我们计算这些衰变通道的部分宽度,这与现有的计算使用唯象模型有很大的不同。对于等矢量$1^{-+}$态,主要的衰变模式是$ρπ, f_1π$。对于它的同宿伙伴,它的主要衰变模式是$a_1π$。我们还讨论了在BESIII的$1^{-+}$状态的可能的搜索,例如通过衰变链$J/ψ(ψ')\to π_1 +γ$或$J/ψ(ψ')\to π_1 +ρ$,其中$π_1$可以通过衰变模式$π_1\to ρπ\to π^+π^-π^0$或$π_1\to f_1(1285)π^0$重建。希望本文的工作能对$1^{-+}$杂化介子的实验建立有所帮助。

英文摘要:

We calculate the coupling constants of the decay modes $1^{-+}\rightarrowρπ, f_1π, b_1π, ηπ, η'π, a_1π, f_1η$ within the framework of the light-cone QCD sum rule. Then we calculate the partial width of these decay channels, which differ greatly from the existing calculations using phenomenological models. For the isovector $1^{-+}$ state, the dominant decay modes are $ρπ, f_1π$. For its isoscalar partner, its dominant decay mode is $a_1π$. We also discuss the possible search of the $1^{-+}$ state at BESIII, for example through the decay chains $J/ψ(ψ')\to π_1 +γ$ or $J/ψ(ψ')\to π_1 +ρ$ where $π_1$ can be reconstructed through the decay modes $π_1\to ρπ\to π^+π^-π^0$ or $π_1\to f_1(1285)π^0$. Hopefully the present work will be helpful to the experimental establishment of the $1^{-+}$ hybrid meson.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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