由STAR、PHENIX和BRAHMS确定的$\sqrt{s}$ = 200 GeV处Au+Au碰撞的粒子谱与核-电晕模型预测的比较
Identified Particle Spectra for Au+Au Collisions at $\sqrt{s}$ = 200 GeV from STAR, PHENIX and BRAHMS in Comparison to Core-Corona Model Predictions
摘要：
核心电晕模型相当成功地描述了在束流能量为$\sqrt{s}$ = 17 GeV和200 GeV之间的重离子反应中观察到的已识别粒子的多重数和$<p_t>$的中心依赖性。此外，椭圆流，$v_2$，所有带电粒子和识别的中心依赖性可以在这个模型中得到解释。在这里，我们扩展这种分析和研究的中心依赖性的单粒子光谱的识别粒子。我们在这里集中讨论质子、反质子、K介子和π介子，它们都是由PHENIX、STAR和BRAHMS合作测量的。我们发现，在核心电晕模型的光谱分析遭受不同的实验组，特别是对pp碰撞公布的数据的差异。对于每一个经验的数据同意与核心电晕模型的预测，但两个必要的参数的值取决于实验。
英文摘要：
The core-corona model describes quite successfully the centrality dependence of multiplicity and $<p_t>$ of identified particles observed in heavy ion reaction at beam energies between $\sqrt{s}$ = 17 GeV and 200 GeV. Also the centrality dependence of the elliptic flow, $v_2$, for all charged and identified particles could be explained in this model. Here we extend this analysis and study the centrality dependence of single particle spectra of identified particles. We concentrate here on protons, antiprotons, kaons and pions which have all been measured by the PHENIX, STAR and BRAHMS collaborations. We find that an analysis of the spectra in the core-corona model suffers from differences in the data published by the different experimental groups, notably for the pp collisions. For each experience the data agree well with the prediction of the core-corona model but the value of the two necessary parameters depends onthe experiments.
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