arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1102.2854hep-phnucl-th
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具有手征动力学的$\bar{K}NN$系统

The $\bar{K}NN$ system with chiral dynamics

M. Bayar, J. Yamagata-Sekihara, E. Oset

摘要:

我们用Faddeev方程的固定中心近似计算了三体系统$\bar{K}NN$的散射振幅,假设$\bar{K}$对$NN$团簇的散射。$\bar{K}N$振幅,我们从手性幺正动力学,支配的反应,我们发现一个$\bar{K}NN$振幅,峰值约40兆电子伏低于$\bar{K}NN$阈值,与宽度在$|T|^2$的顺序为50兆电子伏的自旋0,并有另一个峰值约27兆电子伏与类似的宽度自旋1。所得结果与采用不同方法但实施手征动力学得到的结果一致。这种方法的简单性使人们能够看到导致结果的重要因素。特别是,我们显示的效果从减少的大小的$NN$集群由于与$\bar{K}$和那些从明确considiration的$ πΣN $通道的三体方程的相互作用。

英文摘要:

We have performed a calculation of the scattering amplitude for the three body system $\bar{K}NN$ assuming $\bar{K}$ scattering against a $NN$ cluster, using the Fixed Center approximation to the Faddeev equations. The $\bar{K}N$ amplitudes, which we take from chiral unitary dynamics, govern the reaction and we find a $\bar{K}NN$ amplitude that peaks around 40 MeV below the $\bar{K}NN$ threshold, with a width in $|T|^2$ of the order of 50 MeV for spin 0 and has another peak around 27 MeV with similar width for spin 1. The results are in line with those obtained using different methods but implementing chiral dynamics. The simplicity of the approach allows one to see the important ingredients responsible for the results. In particular we show the effects from the reduction of the size of the $NN$ cluster due to the interaction with the $\bar{K}$ and those from the explicit considiration of the $ πΣN $ channel in the three body equations.

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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