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arXiv 0910.0140hep-ph
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$η'\toηππ$的手性动力学预测

Chiral Dynamics Predictions for $η'\toηππ$

Pere Masjuan

摘要:

我们用两种不同的手性不变方法研究了$η'\toηππ$的衰变:大$N_c$手性微扰理论(ChPT)和大$N_c$共振手性理论(RChT).我们分析了Dalitz图和不变质谱。我们还比较了这些方法中的Isoscope和Isovector通道的相关性。虽然预测的大- $N_c$ ChPT在下一个领先的顺序稍微不同意测量的衰变宽度(显示需要最终状态的相互作用和更高阶的本地贡献),一个合理的协议,获得的情况下RChT。即将在波恩、弗拉斯卡蒂、于利希和美因茨进行的实验分析将在不同的框架中作出决定。

英文摘要:

We study the decay $η'\toηππ$ in two different chiral invariant approaches: Large-$N_c$ Chiral Perturbation Theory (ChPT) and Large-$N_c$ Resonance Chiral Theory (RChT). We analyze the Dalitz plot and the invariant mass spectra. We also compare the relevance of the isoscalar and isovector channels in these approaches. While the predictions of Large-$N_c$ ChPT at next-to-leading order slightly disagree with the measured decay width (showing the need for final state interactions and higher order local contributions), a reasonable agreement is obtained for the case of RChT. Forthcoming experimental analyses at Bonn, Frascati, Jülich and Mainz will decide among the different frameworks.

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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