论文标题
在$ k^+λ$光生生效中，山脊回归以最大程度地减少超子共振的耦合
Ridge regression for minimizing the couplings of hyperon resonances in the $K^+ Λ$ photoproduction
论文作者
论文摘要
我们采用了ISOBAR模型来研究$ K^+λ$光增生过程。我们特别注意最近的CLAS两极分化数据，并通过增加罚款期限提高了$χ^2 $最小化。在不更改模型所使用的一组谐振的情况下，这种称为脊回归的技术导致了降低的耦合，这些耦合在先前的研究中获得了不合理的大值。结果，我们已经达到了一个更强大的模型，其超子耦合将减少到更多的物理值。该模型使我们可以提取有关$ K^+λ$光生生产的背景的有价值的信息，尤其是在各种超子共振的作用上。核子共振的集合相对于先前的拟合是相同的，但是由于它们在当前拟合中获得的不同耦合而可能发生了变化。
We employed the isobar model for investigating the $K^+Λ$ photoproduction process. We paid special attention to the recent CLAS polarization data and enhanced the $χ^2$ minimization by adding a penalty term. Without changing the set of included resonances used by the model, this technique known as Ridge regression leads to reduced couplings that in previous studies acquired unreasonably large values. As a result, we have arrived at a much more robust model with hyperon couplings which are reduced to more physical values. This model serves us to extract valuable information on the background to the $K^+Λ$ photoproduction and particularly on the role of various hyperon resonances. The set of the nucleon resonances is the same with respect to previous fits but their role may have changed due to different couplings which they acquire in the present fit.
