Scaling behavior at high pT and the p/p ratio
Scaling behavior at high pT and the p/p ratio
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DOI：
10.1103/physrevc.67.034902
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发表时间：
2002-11
影响因子：
3.1
通讯作者：
R. Hwa;C. B. Yang
中科院分区：
文献类型：
--
作者：
R. Hwa;C. B. Yang
我们首先证明，当用标度变量绘制分布时，在大范围高能重离子碰撞中以高$p_T$产生的π子表现出标度行为。然后，我们使用复合模型来计算强子化之前的标度夸克分布。从夸克分布，然后可以计算质子分布在高$p_T$，也在重组模型的框架。由此产生的$p/\pi$的比例超过了一个在中间$p_T$区域的数据存在，但质子分布的标度结果是不可靠的，除非$p_T$是足够高，是不敏感的尺度打破质量效应。
We first show that the pions produced at high $p_T$ in heavy-ion collisions over a wide range of high energies exhibit a scaling behavior when the distributions are plotted in terms of a scaling variable. We then use the recombination model to calculate the scaling quark distribution just before hadronization. From the quark distribution it is then possible to calculate the proton distribution at high $p_T$, also in the framework of the recombination model. The resultant $p/\pi$ ratio exceeds one in the intermediate $p_T$ region where data exist, but the scaling result for the proton distribution is not reliable unless $p_T$ is high enough to be insensitive to the scale-breaking mass effects.