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首页> 外文期刊>Nuclear Physics, A: Journal Devoted to the Experimental Study of the Fundamental Constituents of Matter and Their Actions >Widths of charged particle pseudorapidity density distributions in high energy p(p)over-bar and AA collisions
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Widths of charged particle pseudorapidity density distributions in high energy p(p)over-bar and AA collisions

机译：高能p（p）跨栏和AA碰撞中带电粒子伪快速密度分布的宽度

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The paper presents a fit to pseudorapidity distributions of final-state charged particles produced in hadron and heavy ion experiments at different center-of-mass energies. Distributions of charged particles measured in p (p) over bar, p(d)A, and AA collisions at high energies are presented and good agreement between the fit and the data is found. The basis of the fits is a semi-empirical formula which is obtained from a simple Feynman gas model, namely the two-cylinder gas model. For p (p) over bar and AA collisions, the dependence of the width of charged particle pseudorapidity density distributions on logarithmic center-of-mass energy is studied and found to be a linear relationship. Meanwhile, the dependences of the two-cylinder length, single cylinder length, and gap width between the two cylinders on logarithmic center-of-mass energy are found to be linear relationships. As another check and application of the semi-empirical formula, the rapidity distributions of net-protons emitted in AA collisions at high energies are studied. Similar conclusions are obtained. (c) 2007 Elsevier B.V. All rights reserved.
机译：本文提出了在强子和重离子实验中在不同质心能量下产生的最终状态带电粒子的拟快速分布的拟合。给出了在高能量下以p（p）在bar，p（d）A和AA碰撞上测得的带电粒子分布，并且找到了拟合值与数据之间的良好一致性。拟合的基础是从简单的费曼气体模型（即两缸气体模型）获得的半经验公式。对于在bar和AA碰撞上的p（p），研究了带电粒子假快速密度分布的宽度与对数质心能量的相关性，发现是线性关系。同时，发现两个圆柱体的长度，单个圆柱体的长度以及两个圆柱体之间的间隙宽度对数质心能量的依赖性是线性关系。作为半经验公式的另一种检验和应用，研究了高能下AA碰撞中发射的净质子的快速分布。得到类似的结论。 （c）2007 Elsevier B.V.保留所有权利。

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