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arXiv 1209.0064hep-phhep-ex
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介子环作用下粲夸克之间的η跃迁

η transitions between charmonia with meson loop contributions

Dian-Yong Chen, Xiang Liu, Takayuki Matsuki

摘要:

通过在有效拉格朗日方法中引入粲介子环来增强衰变振幅,研究了$ψ(4040/4160)$和$J/ψ$之间的$η$跃迁.在合理的参数范围内,本文估算的支化分数$\mathcal{B}[ψ(4040) \to J/ψη]$和$\mathcal{B}[ψ(4160) \to J/ψη]$可以很好地解释Belle和BESIII的实验测量结果。研究了$ψ(4160)$和$J/ψ$之间的$η^\prime$跃迁,其分支分数低于CLEO的上限,这一点可以通过后续的实验进行验证。

英文摘要:

We study the $η$ transitions between $ψ(4040/4160)$ and $J/ψ$ by introducing charmed meson loops in an effective Lagrangian approach to enhance the decay amplitudes. The branching fractions $\mathcal{B}[ψ(4040) \to J/ψη]$ and $\mathcal{B}[ψ(4160) \to J/ψη]$ estimated in this paper can remarkably explain the experimental measurements of Belle and BESIII within a reasonable parameter range. The $η^\prime$ transition between $ψ(4160)$ and $J/ψ$ is also investigated, and the branching fraction is under the upper limit of CLEO, which can be tested by future experiments.

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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