论文标题
在非弹性核子核子横截面中阴影？
Shadowing in inelastic nucleon-nucleon cross section?
论文作者
论文摘要
重型离子碰撞中包含硬过程的实验结果通常依赖于从Glauber模型中计算出的归一化，其中无弹性核子 - 核糖横截面$σ_ {\ rm nn}^{\ rm nn}^{\ rm inel} $ - 仅从proton-Proton-Proton-Proton-Proton测量中获取了至关重要的输入参数。在这封信中，使用铅铅碰撞中的计算出的电动螺旋体生产横截面作为基准，我们确定$σ_{\ rm nn}^{\ rm inel} $从最近的ATLAS数据中。我们发现相对于通常假设的$σ_ {\ rm nn}^{\ rm inel} $，显示了横截面的中心性依赖性的后果，并以核阴影为eikonal minijet模型中的现象。
Experimental results of inclusive hard-process cross sections in heavy-ion collisions conventionally lean on a normalization computed from Glauber models where the inelastic nucleon-nucleon cross section $σ_{\rm nn}^{\rm inel}$ -- a crucial input parameter -- is simply taken from proton-proton measurements. In this letter, using the computed electro-weak boson production cross sections in lead-lead collisions as a benchmark, we determine $σ_{\rm nn}^{\rm inel}$ from the recent ATLAS data. We find a significantly suppressed $σ_{\rm nn}^{\rm inel}$ relative to what is usually assumed, show the consequences for the centrality dependence of the cross sections, and address the phenomenon in an eikonal minijet model with nuclear shadowing.
