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在光子-碰撞中,具有大动量转移的排他性流体内的亚齐穆斯相关性
A Tumasyan1, W Adam2, T Bergauer2
1Yerevan Physics Institute, Yerevan, Armenia.
Physical review letters
|August 18, 2023
概括
这项研究测量了光子-相互作用中的亚齐穆斯角相关性,揭示了对核子偏振的洞察力. 结果表明,目前的模型需要改进,以解释高能碰撞中观察到的相关性.
科学领域:
- 高能粒子物理学 高能粒子物理学
- 量子色态动力学 是一个量子色态动力学.
- 核物理 核物理是核物理的.
背景情况:
- 核子的结构是复杂的,取决于部分的横向动量,空间几何和极化.
- 来自超外围重离子碰撞的高能光子为研究这种结构提供了一个独特的探测器.
- 了解核子极化对于完整了解核子结构至关重要.
研究的目的:
- 介绍第一个对光子-相互作用中独家喷射生成的亚齐木斯图角相关性测量.
- 为了研究这个过程对潜在的核子极化反应的敏感性.
- 将实验结果与理论模型进行比较.
主要方法:
- 在sqrt[s_{NN}]=5.02 TeV时对超外围与碰撞的分析,使用0.38 nb^{-1}集成的光度数据集.
- 通过大型强子对撞机 (LHC) 的紧型子电磁体 (CMS) 实验收集的数据.
- 测量两个喷射的横向动量向量之间的亚齐穆斯角相关性.
主要成果:
- 测量了喷气横向动量向量的和和差之间的亚齐木斯图角相关性的第二波.
- 这种波被发现是正的,并表现出一个上升的趋势,随着喷射横向动量的增加.
- 一个广泛使用的理论模型,成功用于质子散射数据,未能再现观察到的相关性.
结论:
- 在光子-相互作用中观察到的亚齐木图角相关性为核极化效应提供了证据.
- 与标准模型的差异表明需要精细的理论框架,包括质极化.
- 这种测量为探索核子的多维结构开辟了新的途径.
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