能能相关器中的正负电子

IF 5 1区 物理与天体物理 Q1 PHYSICS, PARTICLES & FIELDS
Stella T. Schindler, Iain W. Stewart, Zhiquan Sun
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引用次数: 0

摘要

能-能相关器(EEC)是对撞机物理和标准模型测量中的一种观测指标,由于它既可以用能-动量张量进行简单的理论描述,又具有实验研究的新特点,因而受到广泛关注。EEC的应用和高阶微扰预测都取得了重大进展。在这里,我们分析了 EEC 的渐近微扰序列的性质,确定了其在泡和近似下在 Borel 空间的解析形式。这一结果提供了通过正负电子极的前导和次前导非微扰幂修正的信息。我们通过使用与泡和近似无关的MSR方案去除EEC的前导重正子,改善了EEC的(overline{textrm{MS}})数列的扰动收敛性。使用由推力拟合确定的前导MSR方案功率修正,我们发现已经在\( \mathcal{O} \)(\( {\alpha}_s^2 \))处与EEC OPAL数据有很好的一致性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Renormalons in the energy-energy correlator

The energy-energy correlator (EEC) is an observable of wide interest for collider physics and Standard Model measurements, due to both its simple theoretical description in terms of the energy-momentum tensor and its novel features for experimental studies. Significant progress has been made in both applications and higher-order perturbative predictions for the EEC. Here, we analyze the nature of the asymptotic perturbative series for the EEC by determining its analytic form in Borel space under the bubble-sum approximation. This result provides information on the leading and subleading nonperturbative power corrections through renormalon poles. We improve the perturbative convergence of the \( \overline{\textrm{MS}} \) series for the EEC by removing its leading renormalon using an MSR scheme, which is independent of the bubble-sum approximation. Using the leading MSR scheme power correction determined by fits to thrust, we find good agreement with EEC OPAL data already at \( \mathcal{O} \)(\( {\alpha}_s^2 \)).

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来源期刊
Journal of High Energy Physics
Journal of High Energy Physics PHYSICS, PARTICLES & FIELDS-
CiteScore
10.00
自引率
46.30%
发文量
2107
审稿时长
12 weeks
期刊介绍: The aim of the Journal of High Energy Physics (JHEP) is to ensure fast and efficient online publication tools to the scientific community, while keeping that community in charge of every aspect of the peer-review and publication process in order to ensure the highest quality standards in the journal. Consequently, the Advisory and Editorial Boards, composed of distinguished, active scientists in the field, jointly establish with the Scientific Director the journal''s scientific policy and ensure the scientific quality of accepted articles. JHEP presently encompasses the following areas of theoretical and experimental physics: Collider Physics Underground and Large Array Physics Quantum Field Theory Gauge Field Theories Symmetries String and Brane Theory General Relativity and Gravitation Supersymmetry Mathematical Methods of Physics Mostly Solvable Models Astroparticles Statistical Field Theories Mostly Weak Interactions Mostly Strong Interactions Quantum Field Theory (phenomenology) Strings and Branes Phenomenological Aspects of Supersymmetry Mostly Strong Interactions (phenomenology).
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