在大型强子对撞机上用ALICE测量的粒子产生与系统大小和潜在事件活动的关系。

M. Krüger
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引用次数: 0

摘要

高能碰撞在爱丽丝允许研究软和硬QCD粒子的产生。横向动量谱和事件多重性之间的相关性是一种敏感的观测结果,可以深入了解不同的产生机制。在这些程序中,我们报告了使用二维展开程序获得的未知带电粒子的观察结果。比较了不同碰撞能量下的粒子产生,以及相同能量下的pp、p—Pb和Pb—Pb碰撞。为了理解自相关在小型系统中的作用,提出利用底层事件作为多重估计器来分解事件的硬组件和软组件。为此,在这些程序中,带电粒子的横向动量分布也被表示为pp碰撞中潜在事件活动的函数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Particle production as a function of system size and underlying-event activity measured with ALICE at the LHC.
High-energy collisions in ALICE allow for the study of soft and hard QCD particle production. The correlation between transverse momentum spectra and event multiplicity is a sensitive observable providing insights into the different production mechanisms. In these proceedings we report on this observable for unidentified charged-particles, obtained using a 2d-unfolding procedure. Particle production is compared at different collision energies, as well as for pp, p--Pb and Pb--Pb collisions at the same energy. In order to understand the role of autocorrelations in small systems, it was proposed to exploit the usage of the underlying event as a multiplicity estimator to factorize the hardest and the softer components of the events. For this purpose, in these proceedings the charged particle transverse momentum distributions are also presented as a function of underlying-event activity in pp collisions.
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