论文标题
使用新事件形状 - 扁平化查看PP碰撞中的“刺猬”事件
A look into the "hedgehog" events in pp collisions using a new event shape -- flatenicity
论文作者
论文摘要
UA1和CDF协作报告了存在的事件，其低动量轨道的非常扩展的结构以均匀的方式填充$η-φ$相位空间。但是，这些事件并未引起对它们互动的细节的兴趣。我们已经承诺研究当前事件发生器（如毕田8号）是否预测了此类事件。我们报告了在高多种PP碰撞中没有任何可辨别的喷气结构的事件的存在。在模拟中，这些事件起源于同一PP碰撞中的中等数量的Parton-Parton散射。提出了一个新的事件形状，即$ρ$（扁平化），以便在此类事件上轻松触发。
The UA1 and CDF collaborations have reported the presence of events with a very extended structure of low momentum tracks filling in a uniform way the $η-φ$ phase space. However, these events have not caused interest with respect to the details of the interaction that originate them. We have undertaken to study whether such events are predicted by present event generators like PYTHIA 8. We report the existence of events without any discernible jet structure in high-multiplicity pp collisions. In the simulations those events originate from a moderate number of parton-parton scatterings within the same pp collision. A new event shape, $ρ$ (flatenicity), is proposed to allow for easily triggering on such events.
