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在π源动量分布的高斯分布下,给出了相对论重离子碰撞中非关联π对和关联π对的相对动量分布.用关联π对的相对动量分布得到球形高斯分布π源参数与椭球形高斯分布π源参数的解析关系,与相对论重离子中心碰撞1.8AGeV Ar+Pb的实验结果进行了对比.当π源温度更高时,应当用 p1(p)=N·exp(-m2+p2/T)进行计算.
Under the Gaussian distribution of π source momentum distribution, the relative momentum distributions of the uncorrelated π pairs and the associated π pairs in the relativistic heavy ion collisions are given. The analytical relationship between the spherical Gaussian distribution π source parameter and the ellipsoid Gaussian distribution π source parameter is obtained by the relative momentum distribution of the associated π pairs, and the experimental results are compared with that of the relativistic heavy ion center collision of 1.8 AGeV Ar + Pb. When the source temperature is higher, p1 (p) = N · exp (-m2 + p2 / T) should be calculated.