Treatment of the infrared contribution: NLO QED evolution as a pedagogic example

Autor(es)

de Oliveira, E. G. ^{[1, 2]} ; Martin, A. D. ^[2] ; Ryskin, M. G. ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil

^[2] Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LE - England

^[3] NRC Kurchatov Inst, Petersburg Nucl Phys Inst, St Petersburg 188300 - Russia

• Tipo de documento: Artigo Científico
• Fonte: EUROPEAN PHYSICAL JOURNAL C; v. 73, n. 8 AUG 2013.
• Citações Web of Science: 4

Resumo

We show that the conventional prescription used for DGLAP parton evolution at NLO has an inconsistent treatment of the contribution from the infrared (IR) region. We illustrate the problem by studying the simple example of QED evolution, treating the electron and photon as partons. The deficiency is not present in a physical approach which removes the IR divergency and allows calculation in the normal 4-dimensional space. (AU)

• Processo FAPESP: 12/05469-4 - Estudos fenomenológicos oportunos relevantes para o LHC
• Beneficiário: Emmanuel Gräve de Oliveira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado