柯林斯不对称的能量独立性在p^{↑}p碰撞中
B E Aboona1, J Adam2, L Adamczyk3
1Texas A&M University, College Station, Texas 77843.
Physical review letters
|January 20, 2026
概括
STAR实验测量了在质子对质子碰撞中喷射中的带电 pion 的柯林斯不对称性. 这些不对称性显示出非凡的能量独立性,为粒子物理学提供了洞察力.
科学领域:
- 高能粒子物理学 高能粒子物理学
- 量子染色动力学 (QCD) 是一个
- 旋转物理 旋转物理
背景情况:
- 横向单旋不对称性提供了关于质子自旋结构的关键信息.
- 柯林斯不对称性是旋转物理学中的一个关键可观察物,它探测了夸克和子的旋转动量相关性.
研究的目的:
- 为了精确测量喷气体内的充电引脚的柯林斯不对称性.
- 研究这些不对称性在质子对质子碰撞中的能量和尺度依赖.
- 测试横向动量依赖 (TMD) 部分分布函数的普遍性和演变.
主要方法:
- 利用布鲁克黑文国家实验室STAR实验的数据.
- 分析了喷气式飞机内充电型飞行器生产的高精度测量.
- 检查了横向极化质子在510GeV的质量中心能量中的碰撞.
主要成果:
- 在不同碰撞能量 (200GeV和510GeV) 的喷气中,对充电的子在柯林斯不对称性中观察到显著的一致性.
- 在质子对质子碰撞中证明了柯林斯不对称的能量独立性和弱尺度依赖性.
- 结果扩展到高动量尺度 (Q^2 ≤ 3400 GeV^2).
结论:
- 喷气体内的柯林斯不对称性在很大程度上独立于碰撞能量和尺度.
- 这些发现给柯林斯碎片化函数带来了强烈的约束.
- 结果验证了横向动量依赖形式主义及其在描述旋转现象中的普遍性.
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