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arXiv 1302.2301nucl-thhep-ph
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K介子和光子诱导反应中奇异二重子的特征

Signature of strange dibaryons in kaon- and photon-induced reactions

Shota Ohnishi, Yoichi Ikeda, Hiroyuki Kamano, Toru Sato

摘要:

本文研究了在物理实能量轴上的三体$\bar{K}NN$ - $πY N (Y=Σ, Λ)$系统中,奇异双重子共振的特征如何在散射振幅和可观测量中出现。所谓的点方法是用来处理对数奇异性,出现在解决Alt-Grassberger-Sandhas方程的实际散射能量。通过对两体$\bar{K}N$ - $πΣ$子系统采用两种不同的模型,这两种模型都能很好地再现已有的数据,但对$Λ(1405)$给出了完全不同的共振极结构,我们还研究了奇异双重子产生反应是否可以用来解开$Λ(1405)$的性质.

英文摘要:

We examine how the signature of the strange dibaryon resonances shows up in scattering amplitudes and observables of the three-body $\bar{K}NN$-$πY N (Y=Σ, Λ)$ system on the physical real energy axis. The so-called point method is applied to handle logarithmic singularities that appear in solving the Alt-Grassberger-Sandhas equations for the real scattering energies. By taking two different kinds of models for the two-body $\bar{K}N$-$πΣ$ subsystem, both of which reproduce the available data equally well but give quite a different resonance-pole structure for $Λ(1405)$, we also investigate whether the strange-dibaryon production reactions can be used for disentangling the nature of $Λ(1405)$.

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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