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Dimensional schemes for cross sections at NNLO

Gnendiger, C. ; Signer, A.

The European physical journal. C, Particles and fields, 2020-03, Vol.80 (3), p.1-12, Article 215 [Periódico revisado por pares]

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Título:
Dimensional schemes for cross sections at NNLO
Autor: Gnendiger, C. ; Signer, A.
Assuntos: Astronomy ; Astrophysics and Cosmology ; Cross sections ; Elementary Particles ; Hadrons ; Heavy Ions ; Measurement Science and Instrumentation ; Nuclear Energy ; Nuclear Physics ; Physics ; Physics and Astronomy ; Positron annihilation ; Quantum Field Theories ; Quantum Field Theory ; Regular Article - Theoretical Physics ; Regularization ; String Theory
É parte de: The European physical journal. C, Particles and fields, 2020-03, Vol.80 (3), p.1-12, Article 215
Descrição: So far, the use of different variants of dimensional regularization has been investigated extensively for two-loop virtual corrections. We extend these studies to real corrections that are also required for a complete computation of physical cross sections at next-to-next-to-leading order. As a case study we consider two-jet production in electron-positron annihilation and describe how to compute the various parts separately in different schemes. In particular, we verify that using dimensional reduction the double-real corrections are obtained simply by integrating the four-dimensional matrix element over the phase space. In addition, we confirm that the cross section is regularization-scheme independent.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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