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arXiv 1503.03518hep-ph
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极化部分子分布函数测定的成就和问题

Achievements and open issues in the determination of polarized parton distribution functions

Emanuele R. Nocera

摘要:

我回顾了当前的状态,确定螺旋度相关的,或极化,部分子分布函数从微扰量子色动力学的实验数据的全面分析。我说明了在相对论重离子对撞机的极化质子-质子碰撞的新的测量驱动的最新成就,即一个相当大的偏振光海夸克不对称性和积极的极化胶子分布在质子的第一个证据。我将讨论哪些是在确定极化分布的开放性问题,以及如何在未来通过正在进行的,计划的和拟议的实验计划来解决这些问题。

英文摘要:

I review the current status of the determination of helicity-dependent, or polarized, parton distribution functions from a comprehensive analysis of experimental data in perturbative quantum chromodynamics. I illustrate the latest achievements driven by new measurements in polarized proton-proton collisions at the Relativistic Heavy Ion Collider, namely the first evidence of a sizable polarized light sea quark asymmetry and of a positive polarized gluon distribution in the proton. I discuss which are the open issues in the determination of polarized distributions, and how these may be addressed in the future by ongoing, planned and proposed experimental programs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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