Analysis of Interaction between UHECRs and nuclei in atmosphere based on QCD

宇宙射线是来自地球外部的高能粒子，它们的能量可能高于地球上加速器所实现的能量。它们被认为是质子或原子核，并通过与大气中的原子核碰撞引起“空气簇射”。在本计画中，我们的目标是在高能强子散射理论发展的基础上，制作一个新的空气簇射模拟程式。我们提出了一种新的理论，称为“彩色玻璃凝聚体”，并构造了一个事件发生器“CGC+HIJING模型”，它描述了空气簇射发展的第一个碰撞事件。

Cosmic rays are high energy particles coming from outside of the earth, and their energies can be higher than those realized by accelerators on the earth. They are thought to be protons or nuclei, and induce "air showers" through collisions with nuclei in the atmosphere. In this project, we aimed to make a new simulation code for air showers based on new theoretical development on high energy hadron scattering. The new theory is called "Color Glass Condensate", and we have constructed an event generator "CGC+HIJING model" which describes the first collision event for the development of air showers.