Transverse Lambda production at the future Electron-Ion Collider

Transverse Lambda production at the future Electron-Ion Collider
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未来电子离子对撞机的横向 Lambda 生产

DOI:
10.1103/physrevd.105.094033
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发表时间:
2022
期刊:
影响因子:
5
通讯作者:
Zhang, Jinlong
Zhang, Jinlong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Kang, Zhong-Bo;Terry, John;Vossen, Anselm;Xu, Qinghua;Zhang, Jinlong

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我们提供了一个全面的概述横向极化生产在未来的电子-离子对撞机(EIC)。特别地,我们研究了自发横向极化以及横向动量相关(TMD)因子化区域内的横向自旋转移。为了描述自发极化,我们考虑了TMD极化碎裂函数(TMD PFF)的贡献。同样,我们研究了横向TMD碎裂函数(TMD FF)引起的横向自旋转移的贡献。我们提供了相应的自旋观测在未来EIC的统计不确定性的预测。使用这些统计不确定性,我们的特点,未来EIC将发挥约束这些分布的作用。我们进行了影响研究的半包容性深非弹性散射过程中的自发极化与质子束。我们发现,预计的实验数据导致显着减少的不确定性,为海上TMD PFF。此外,为了评估EIC对横向TMD FF的影响,我们从最近的COMPASS数据中首次提取了横向TMD FF。我们将未来EIC的统计不确定性与我们提取的理论不确定性进行比较,发现EIC可能在约束这种分布方面发挥重要作用。最后,我们还提供了两个自发极化,以及在EIC背靠背电子喷流生产的射流内的横向自旋转移的预测。
We provide a comprehensive overview of transversely polarizedproduction at the future Electron-Ion Collider (EIC). In particular, we study both spontaneous transversepolarization as well as the transverse spin transfer within the transverse momentum dependent (TMD) factorization region. To describe spontaneouspolarization, we consider the contribution from the TMD polarizing fragmentation function (TMD PFF). Similarly, we study the contribution of the transverse spin transfer originating from the transversity TMD fragmentation function (TMD FF). We provide projections for the statistical uncertainties in the corresponding spin observables at the future EIC. Using these statistical uncertainties, we characterize the role that the future EIC will play in constraining these distributions. We perform an impact study in the semi-inclusive deep inelastic scattering process for spontaneouspolarization with a proton beam. We find that the projected experimental data leads to a significant decrease in the uncertainties for theand sea TMD PFFs. Furthermore, to access the impact of the EIC on the transversity TMD FF, we perform the first extraction of the transversity TMD FF from the recent COMPASS data. We compare the statistical uncertainties of the future EIC with the theoretical uncertainties from our extraction and find that the EIC could have a significant role in constraining this distribution. Finally, we also provide projections for both spontaneouspolarization as well as the transverse spin transfer inside the jets in back-to-back electron-jet production at the EIC.
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