The parton-level structure of e+e- to 2 jets at N3LO

被引：7

作者：

Jakubcik, Petr ^{[1
]}

Marcoli, Matteo ^{[1
]}

Stagnitto, Giovanni ^{[1
]}

机构：

[1] Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 2023卷 / 01期

基金：

瑞士国家科学基金会; 欧洲研究理事会;

关键词：

Higher-Order Perturbative Calculations; SINGULARITIES;

D O I：

10.1007/JHEP01(2023)168

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We investigate the quantum chromodynamics (QCD) corrections to hadronic final states in electron-positron collisions at O(alpha(3)(s)) in the strong coupling constant alpha s. Namely, we analytically compute the total cross section for this process by separately integrating the tree-level five-parton, the one-loop four-parton, the two-loop three-parton, and the three-loop two-parton matrix elements over the respective phase space. All the contributions to the calculation are treated in a common framework whereby phase space integrals are expressed as physical cuts of the four-loop two-point function. We check the cancellation of infrared poles at all colour levels and we reproduce the known result for the R-ratio at order alpha(3)(s).

引用

页数：34

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