In this article, the purpose and status of investigating the event-by-event fluctuations of transverse momentum are summarized both in theory and in experiment.

本文综述了单事件横动量起伏的理论和实验研究目的和现状。

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We argue a factorization formula for semi-inclusive deep-inelastic scattering with hadrons in the current fragmentation region detected at low transverse momentum.

论证了在小横动量区域内半深度非弹性散射量子色动力学因子化公式。

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It's shown that (1) the event-by-event fluctuations of transverse momentum increase drastically with the broadening of rapidity region and lowering of low-pt particle cut.

结果表明：(1)单事件横动量起伏随所取快度区间的加宽和低横动量截断的降低而显著增加。

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