双强子碎裂框架下质子-质子碰撞中的横向自旋依赖的能量-能量关联子
Transverse-spin dependent energy-energy correlators in proton-proton collisions within the dihadron fragmentation framework
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中文总结 AI 辅助
基于双强子碎裂和横向性部分子分布函数的全局QCD分析模型,计算了横向极化质子-质子碰撞中喷注内两个强子产生的能量-能量关联,数值预测与STAR测量吻合,并表明大横向动量数据倾向于支持与格点QCD核子张量电荷一致的横向性提取。
中文摘要 AI 辅助
我们计算了横向极化质子-质子碰撞中喷注内产生的两个强子的能量-能量关联。基于一个利用先前双强子碎裂和横向性部分子分布函数的全局QCD分析的简单模型,我们进行了数值预测。结果与最近的STAR测量显示出显著的一致性。我们还发现,大喷注横向动量数据略微倾向于支持与格点QCD核子张量电荷计算一致的横向性提取。总体而言,这项工作为近端能量-能量关联子的非微扰机制提供了进一步证据,并强调了这些观测量探测核子内横向自旋效应的潜力。
英文摘要
We calculate energy-energy correlations for two hadrons produced inside a jet in transversely polarized proton-proton collisions. We make numerical predictions based on a simple model that utilizes a previous global QCD analysis of dihadron fragmentation and transversity parton distribution functions. The results show remarkable agreement with a very recent STAR measurement. We also find the data at large jet transverse momentum have a slight preference for extractions of transversity that are consistent with lattice QCD computations of the nucleon tensor charges. Overall, this work provides further evidence for the underlying non-perturbative mechanism of near-side energy-energy correlators as well as highlights the potential for these observables to probe transverse-spin effects inside the nucleon.
发表机构
- University of California, Los Angeles(加州大学洛杉矶分校)
- Mani L. Bhaumik Institute for Theoretical Physics, University of California, Los Angeles(加州大学洛杉矶分校马尼·L·布海米克理论物理研究所)
- Center for Frontiers in Nuclear Science, Stony Brook University(纽约州立大学石溪分校核科学前沿中心)
- Temple University(天普大学)
- Lebanon Valley College(黎巴嫩谷学院)
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