arXiv 2102.056692021-02hep-phhep-ex

深部非弹性散射中的能量-能量关联函数

Energy-energy correlators in Deep Inelastic Scattering

Hai Tao Li, Yiannis Makris, Ivan Vitev

备注：: 12 pages, 6 figures; version as published
发表信息：: Phys. Rev. D 103, 094005 (2021)
DOI：: 10.1103/PhysRevD.103.094005

摘要：

能量-能量相关器（EEC）是一种可观测的事件形状，它探测高能对撞机上探测器中能量沉积的角相关性。它已经在精密QCD的背景下得到了广泛的研究。在这项工作中，我们介绍了一种新的定义EEC适应Breit框架中的深度非弹性散射（DIS）。在背靠背极限下，我们提出的观测量对普遍的横动量相关（TMD）部分子分布函数和碎裂函数敏感，可以在传统的TMD分解形式下进行研究.我们进一步表明，新的观察是不敏感的实验赝快度削减，经常施加在实验室的框架，由于检测器的接受限制。在这项工作中，新的观测的奇异分布得到软共线有效理论高达$\mathcal{O}(α_s^3)$，并验证了完整的QCD计算高达$\mathcal{O}(α_s^2)$。在奇异极限下的重算可达到次至前导对数精度。将非微扰效应后，我们提出了我们的预测PYTHIA 8模拟的比较。

英文摘要：

The energy-energy correlator (EEC) is an event shape observable which probes the angular correlations of energy depositions in detectors at high energy collider facilities. It has been investigated extensively in the context of precision QCD. In this work, we introduce a novel definition of EEC adapted to the Breit frame in deep-inelastic scattering (DIS). In the back-to-back limit, the observable we propose is sensitive to the universal transverse momentum dependent (TMD) parton distribution functions and fragmentation functions, and it can be studied within the traditional TMD factorization formalism. We further show that the new observable is insensitive to experimental pseudorapidity cuts, often imposed in the Laboratory frame due to detector acceptance limitations. In this work the singular distributions for the new observable are obtained in soft collinear effective theory up to $\mathcal{O}(α_s^3)$ and are verified by the full QCD calculations up to $\mathcal{O}(α_s^2)$. The resummation in the singular limit is performed up to next-to-next-to-next-to-leading logarithmic accuracy. After incorporating non-perturbative effects, we present a comparison of our predictions to PYTHIA 8 simulations.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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