软胶子耦合与TMD部分子分支Sudakov形因子

IF 4.5 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics Letters B Pub Date : 2025-07-29 DOI:10.1016/j.physletb.2025.139762

A. Bermudez Martinez , F. Hautmann , L. Keersmaekers , A. Lelek , M. Mendizabal Morentin , S. Taheri Monfared , A.M. van Kampen

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引用次数: 0

摘要

量子色动力学（QCD）中横向动量依赖（TMD）分布的演化可以用分子分支（PB）框架来表述。我们证明，通过使用软胶子物理耦合的概念，可以在该框架中实现次至次至前导对数（NNLL）精度。我们给出了TMD分布和Collins-Soper核控制快速演化的结果。该结果为在NNLL水平上对大型强子对撞机（LHC）和未来对撞机的物理观测进行PB预测铺平了道路。

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Soft-gluon coupling and the TMD parton branching Sudakov form factor

The evolution of transverse momentum dependent (TMD) distributions in Quantum Chromodynamics (QCD) can be formulated in a parton branching (PB) framework. We show that next-to-next-to-leading-logarithm (NNLL) accuracy can be achieved in this framework by using the concept of soft-gluon physical coupling. We present results for the TMD distributions and for the Collins-Soper kernel controlling rapidity evolution. The results pave the way for PB predictions at NNLL level for physical observables at the Large Hadron Collider (LHC) and future colliders.

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来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.