最低阶能量无关手性基$\bar{K}N$势与实验数据的拟合
Lessons from fitting the lowest order energy independent chiral based $\bar{K}N$ potential to experimental data
摘要：
它示出，拟合参数的$\bar{K}N$相互作用模型，以不同的实验数据集可以导致物理的结论，这可能会提供一个更深入的了解这个多通道系统的物理。现有的实验数据分为三个部分：“经典”集组成的低能$K^-p$截面和阈值分支比，SIDDHARTA $1s$能级移动K介子氢和CLAS光生数据。我们已经将势的参数拟合到这些数据的不同组合。我们发现，对应于$I=0$核准束缚态（$\Lam$）和对应于$K^-p$ $1s$原子能级的两极似乎抵制它们在正确位置的同时再现，尽管或多或少可以达到令人满意的折衷.将$\Lam$极点固定在接近PDG值的位置时，电势不能以可接受的精度再现经典的两体数据。我们还添加了对两篇论文的评论，这两篇论文批评了配合中使用的潜力。
英文摘要：
It is shown, that fitting parameters of a $\bar{K}N$ interaction model to different sets of experimental data can lead to physical conclusions which might provide a deeper insight into the physics of this multichannel system. The available experimental data are divided into three parts: the "classical" set consisting of the low-energy $K^-p$ cross sections and the threshold branching ratios, the SIDDHARTA $1s$ level shift in kaonic hydrogen and the CLAS photoproduction data. We have fitted the parameters of the potential to different combinations of these data. We found, that the two poles corresponding to the $I=0$ nuclear quasi-bound state ($\Lam$) and to the $K^-p$ $1s$ atomic level seem to resist to their simultaneous reproduction at the right place, though a more or less satisfactory compromise can be achieved. Potentials with the $\Lam$ pole pinned down close to the PDG value fail to reproduce the classical two-body data with an acceptable accuracy. We also added comments on two papers criticizing the potential used in the fits.
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