Angular Distributions of Finalstate Particles Produced in Nucleus-nucleus Collisions
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摘要: 用各向同性的火球模型研究了能量为14.6 AGeV的16OEm碰撞中末态产物的发射角分布和能量为4.5 AGeV的28SiEm碰撞中靶核碎块中黑粒子的方位角分布。 在这个模型中增加横向流可以描述能量为3.7 AGeV的C-Ne和C-Cu碰撞中靶核碎块π介子和质子的方位角分布。 计算结果与实验数据符合得较好, 表明改进了的火球模型能够描述高能核核碰撞的角分布。
The emission angular distributions of finalstate particles produced in 16OEmulsion (Em) collisions at 14.6 AGeV, and the azimuthal angular distributions for the black particles produced in 28SiEm at 4.5 AGeV have been studied by an isotropic fireball model. The model including transverse flow is used to describe the azimuthal distributions of midrapidity π- mesons and protons produced in CNe and CCu collisions at 3.7 AGeV. The calculated results are in agreement with the experimental angular distributions. It shows that the improved fireball model gives a good description of nucleusnucleus collisions at high energies.Abstract: The emission angular distributions of finalstate particles produced in 16OEmulsion (Em) collisions at 14.6 AGeV, and the azimuthal angular distributions for the black particles produced in 28SiEm at 4.5 AGeV have been studied by an isotropic fireball model. The model including transverse flow is used to describe the azimuthal distributions of midrapidity π- mesons and protons produced in CNe and CCu collisions at 3.7 AGeV. The calculated results are in agreement with the experimental angular distributions. It shows that the improved fireball model gives a good description of nucleusnucleus collisions at high energies.-
Key words:
- angular distribution /
- isotropic fireball model /
- target fragment /
- transverse flow
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