Roca L, Mai M, Oset E, Meißner Ulf-G
Departamento de Física, Universidad de Murcia, 30100 Murcia, Spain.
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Universität Bonn and Bethe Center for Theoretical Physics, 53115 Bonn, Germany.
Eur Phys J C Part Fields. 2015;75(5):218. doi: 10.1140/epjc/s10052-015-3438-1. Epub 2015 May 19.
We calculate the shape of the [Formula: see text] and [Formula: see text] invariant mass distributions in the [Formula: see text] and [Formula: see text] decays that are dominated by the [Formula: see text] resonance. The weak interaction part is the same for both processes and the hadronization into the different meson-baryon channels in the final state is given by symmetry arguments. The most important feature is the implementation of the meson-baryon final-state interaction using two chiral unitary models from different theoretical groups. Both approaches give a good description of antikaon-nucleon scattering data, the complex energy shift in kaonic hydrogen and the line shapes of [Formula: see text] in photoproduction, based on the two-pole scenario for the [Formula: see text]. We find that this reaction reflects more the higher mass pole and we make predictions of the line shapes and relative strength of the meson-baryon distributions in the final state.
我们计算了由[公式：见正文]共振主导的[公式：见正文]和[公式：见正文]衰变中[公式：见正文]和[公式：见正文]不变质量分布的形状。两个过程的弱相互作用部分相同，并且基于对称性论证给出了末态向不同介子 - 重子通道的强子化。最重要的特征是使用来自不同理论组的两个手征幺正模型来实现介子 - 重子末态相互作用。基于[公式：见正文]的双极点情形，两种方法都能很好地描述反K介子 - 核子散射数据、奇异氢中的复能移以及光生过程中[公式：见正文]的线形。我们发现该反应更多地反映了较高质量的极点，并且我们对末态介子 - 重子分布的线形和相对强度进行了预测。
