gg → Z Z: analytic two-loop results for the low- and high-energy regions

被引：19

作者：

Davies, Joshua ^{[1
]}

Mishima, Go ^{[1
,2
]}

Steinhauser, Matthias ^{[1
]}

Wellmann, David ^{[1
]}

机构：

[1] Karlsruhe Inst Technol, Inst Theoret Teilchenphys, Wolfgang Gaede Str 1, D-76128 Karlsruhe, Germany

[2] Karlsruhe Inst Technol, Inst Kernphys, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2020年 / 2020卷 / 04期

关键词：

NLO Computations; QCD Phenomenology; ZZ PRODUCTION; Z-BOSON; AMPLITUDES; 2L2V; 4L;

D O I：

10.1007/JHEP04(2020)024

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 compute next-to-leading order virtual two-loop corrections to the process gg -> ZZ in the low- and high-energy limits, considering the contributions with virtual top quarks. Analytic results for all 20 form factors are presented including expansion terms up to 1=m(t)(12) and m(t)(32). We use a Pade approximation procedure to extend the radius oft convergence of the high-energy expansion and apply this approach to the finite virtual next-to-leading order corrections.

引用

页数：30

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