发表机构
Brookhaven National Laboratory（布鲁海文国家实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究未来电子-离子对撞机上横向自旋不对称性受次领头阶QCD修正的影响，发现其稳健且能互补LHC及中子电偶极矩限制，主要不确定性源于下夸克横向性分布函数。
AI 中文摘要
我们考虑了在未来的电子-离子对撞机（EIC）上，使用极化电子和质子束进行深度非弹性散射时，轻夸克偶极子算子对横向自旋不对称性（TSAs）的次领头阶（NLO）QCD修正效应。TSAs在包含NLO QCD效应后依然稳健，并为新物理提供了灵敏度，这与从LHC的Drell-Yan测量和中子电偶极矩中提取的限制互补。我们结果的主要不确定性来自对下夸克横向性部分子分布函数的现有测定不足。由宇称和时间反演不变性以及手征对称性得出的有趣关系约束了TSAs的解析形式。
英文摘要
We consider the effects of next-to-leading order (NLO) QCD corrections to transverse spin asymmetries (TSAs) in deep inelastic scattering at the future Electron-Ion Collider (EIC) with polarized electron and proton beams that depend on light quark dipole operators. The TSAs are robust under the inclusion of the NLO QCD effects and provide sensitivity to new physics that is complementary to limits extracted from the Drell-Yan measurements at the LHC and from neutron electric dipole moments. The major uncertainty on our results is from the poor existing determination of the transversity parton distribution function for the down quark. Interesting relations from parity and time reversal invariance, along with chiral symmetry, constrain the analytic form of the TSAs.
Comments42 pages, 16 figures
