arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.01359hep-ph
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电子-离子对撞机上宇称破坏半包含深度非弹性散射

Parity violating semi-inclusive deeply inelastic scattering at the Electron-Ion Collider

Kai-bao Chen, Wei-hua Yang

摘要:

我们提出了一个系统的计算电流喷流生产半包容的深度非弹性散射过程中的电子-离子对撞机的能量。贡献从弱相互作用被认为是引起宇称违反的影响。本文考虑极化电子束在自旋为1的极化靶上散射的一般形式。在考虑多重胶子散射的量子色动力学部分子模型中,采用共线展开法,自动得到规范链,计算一直进行到twist-3水平。我们提出完整的结果的结构功能和自旋/方位角不对称性的规范不变的横向动量依赖的部分子分布函数。非极化和极化电子束的情况下,对应于24个方位角不对称,其中6个出现在领先的扭曲,而他们中的18个贡献在扭曲-3水平。此外,我们还计算了由于电磁相互作用和弱相互作用的干涉而引起的宇称破坏不对称性。

英文摘要:

We present a systematic calculation of the current jet production semi-inclusive deeply inelastic scattering process at the Electron-Ion Collider energy. Contributions from weak interactions are considered which give rise to parity violating effects. We consider the general form of the polarized electron beam scattering off the polarized target which has spin 1. The calculations are carried out up to twist-3 level in the quantum chromodynamics parton model by applying the collinear expansion where multiple gluon scattering is taken into account and gauge links are obtained automatically. We present complete results for structure functions and spin/azimuthal asymmetries in terms of the gauge invariant transverse momentum dependent parton distribution functions. Both the unpolarized and the polarized electron beam cases correspond to 24 azimuthal asymmetries, in which 6 of them appear at the leading twist, while 18 of them contribute at twist-3 level. In addition we also calculate the parity-violating asymmetries which arise from the interference of the electromagnetic and weak interactions.

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