arXiv 1402.40712014-02-18hep-ph

横能量的最小偏差分布能检验强子产生模型吗？

Can minimum-bias distributions on transverse energy test hadron production models?

Thomas A. Trainor

备注：: 24 pages, 14 figures

摘要：

最近的一项研究报告了几种高能核碰撞系统中快度横能$E_t$分布的测量结果。的$E_t$数据进行了分析的背景下，组分夸克（CQ）的参与者估计与Glauber模型模拟。该研究的结论是，强子和$E_t$产量的系统变化，以前解释的两个组件的强子生产的软+硬模型（TCM），包括dijet（硬）的贡献，实际上是CQ参与者的趋势，只有软生产的结果。有人声称，偏离线性标度的核子参与者的强子产量与A-A中心性的数量实际上并不像以前假设的那样来自dijet生产。在本研究中，我们研究了新的$E_t$数据的背景下，中医和比较这些结果与以前的差分频谱和最小偏差相关分析。我们提出了大量的证据支持一个显着的dijet贡献的所有高能核碰撞符合TCM和结论，$E_t$数据，由于其系统的不确定性，未能支持声称CQ模型的解释。

英文摘要：

A recent study reports measurements of transverse-energy $E_t$ distributions at mid-rapidity for several high-energy nuclear collision systems. The $E_t$ data are analyzed in the context of constituent-quark (CQ) participants estimated with a Glauber-model simulation. The study concludes that systematic variations of hadron and $E_t$ yields previously interpreted in terms of a two-component soft+hard model (TCM) of hadron production including a dijet (hard) contribution are actually the result of CQ participant trends with only soft production. It is claimed that deviations from linear scaling with the number of nucleon participants of hadron yields vs A-A centrality do not actually arise from dijet production as previously assumed. In the present study we examine the new $E_t$ data in the context of the TCM and compare those results with previous differential spectrum and minimum-bias correlation analysis. We present substantial evidence supporting a significant dijet contribution to all high-energy nuclear collisions consistent with the TCM and conclude that the $E_t$ data, given their systematic uncertainties, fail to support claimed CQ model interpretations.

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