$γp \to K^+ Λ(1520)$微分截面中凸点结构的共振解释
Resonance interpretation of the bump structure in the $γp \to K^+ Λ(1520)$ differential cross section
摘要：
我们研究了在阈值附近的有效拉格朗日方法内的$\vecγ p \to K^+ Λ(1520)$反应中的$Λ(1520)$光生。除了“背景”的贡献，从接触，$t-$通道$K$交换，和$s-$通道核子极条款，这已经被认为是在以前的工作中，贡献的核子共振$N^*(2080)$（自旋宇称$J^P = 3/2^-$）也被认为是。我们表明，包括核子共振$N^*(2080)$导致一个相当好的描述新的LEPS微分截面数据，这些测量可以用来确定后者的共振的一些属性。
英文摘要：
We investigate the $Λ(1520)$ photoproduction in the $\vecγ p \to K^+ Λ(1520)$ reaction within the effective Lagrangian method near threshold. In addition to the "background" contributions from the contact, $t-$channel $K$ exchange, and $s-$channel nucleon pole terms, which were already considered in previous works, the contribution from the nucleon resonance $N^*(2080)$ (spin-parity $J^P = 3/2^-$) is also considered. We show that the inclusion of the nucleon resonance $N^*(2080)$ leads to a fairly good description of the new LEPS differential cross-section data, and that these measurements can be used to determine some of the properties of this latter resonance.
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