阈值下重夸克对产子的解析NNLO横向动量相关软函数

IF 5.5 1区物理与天体物理 Q1 Physics and Astronomy

Journal of High Energy Physics Pub Date : 2025-10-17 DOI:10.1007/JHEP10(2025)164

Hua-Sheng Shao, Guoxing Wang

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引用次数: 0

摘要

强子对撞机非相对论重夸克对产生的横动量相关软函数（TMD）在强耦合展开中以次-次-前序（NNLO）解析计算。我们详细介绍了我们的计算方法，并分析了软函数的一般双环结构。最后的结果采用了一种特别简单的形式，它提供了使用量子切片形式进行彩色八元s波夸克子生成的完整NNLO计算所缺少的最后一个成分——包括charmonium、bottomonium和toponium。它还可以在相同的过程中以较小的横向动量实现相邻相邻相邻的领先对数（N3LL）恢复。

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Analytic NNLO transverse-momentum-dependent soft function for heavy quark pair hadroproduction at threshold

The transverse-momentum-dependent (TMD) soft function for non-relativistic heavy quark pair production at hadron colliders is analytically computed at next-to-next-to-leading order (NNLO) in the strong coupling expansion. We present the details of our computational approach and analyze the general two-loop structure of the soft function. The final result, which takes a particularly simple form, provides the last missing ingredient for a complete NNLO calculation of color-octet S-wave quarkonium hadroproduction — including charmonium, bottomonium, and toponium — using the q_T-slicing formalism. It also enables next-to-next-to-next-to-leading-logarithmic (N³LL) resummation at small transverse momentum for the same process.

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来源期刊

Journal of High Energy Physics 物理-物理：粒子与场物理

CiteScore

10.30

自引率

46.30%

发文量

2107

审稿时长

1.5 months

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).