标题： 强子多重性涨落在微扰QCD中的研究 显示英文标题

标题： Hadron multiplicity fluctuations in perturbative QCD

摘要： 我们研究硬过程中的强子多重性涨落，并将解析的QCD预测与在大型强子对撞机(LHC)的$pp$碰撞中产生的$e^+e^-$湮灭和高$p_t$喷流中观察到的多重性涨落模式进行对比。 特别关注喷流中的高多重性涨落。 多年来，在各种过程中，选择强子多重性超过平均值3倍或更多倍的事件一直是难题的根源。 我们讨论了两个最近的高多重性难题，并试图揭示它们的共同起源。 显示英文摘要

摘要： We examine hadron multiplicity fluctuations in hard processes and confront analytic QCD predictions with the pattern of multiplicity fluctuations observed in $e^+e^-$ annihilation and high-$p_t$ jets produced in $pp$ collisions at the LHC. Special emphasis is placed on high-multiplicity fluctuations in jets. Selecting events with hadronic multiplicity exceeding the average value by a factor of 3 or more in various processes has been a source of conundrums for many years. We discuss two recent high-multiplicity puzzles and attempt to reveal their common origin.