NLO cross sections in 4 dimensions without DREG

30th Annual Meeting of the Division of Particles and Fields (DPyC) of the Mexican Physical Society

Hernández-Pinto, R.J.^1 ; Driencourt-Mangin, F.^2 ; Rodrigo, G.^2 ; Sborlini, G.F.R.^2

Facultad de Ciencias Fisico-Matemáticas, Universidad Autónoma de Sinaloa, Ciudad Universitaria, Culiacán, Sinaloa

CP 80000, Mexico^1

Instituto de Fisica Corpuscular, Universitat de Valencia, Consejo Superior de Investigaciones Cientificas, Parc Cientific, Paterna, Valencia

E-46980, Spain^2

关键词: Duality theorems;    Loop integrals;    Regularisation;    Space time;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/761/1/012021/pdf
DOI  :  10.1088/1742-6596/761/1/012021

来源: IOP

【 摘 要 】

In this review, we present a new method for computing physical cross sections at NLO accuracy in QCD without using the standard Dimensional Regularisation. The algorithm is based on the Loop-Tree Duality theorem, which allow us to obtain loop integrals as a sum of phase-space integrals; in this way, transforming loop integrals into phase-space integrals, we propose a method to merge virtual and real contributions in order to find observables at NLO in d = 4 space-time dimensions. In addition, the strategy described is used for computing the γ∗ → qq(g) process. A more detailed discussion related on this topic can be found in Ref [1].