Relativistic quark spin coupling effects in the nucleon electromagnetic form factors
Nenhuma Miniatura disponível
Data
2000-04-06
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
We investigate the effect of different forms of relativistic spin coupling of constituent quarks in the nucleon electromagnetic form factors. The four-dimensional integrations in the two-loop Feynman diagram are reduced to the null-plane, such that the light-front wave function is introduced in the computation of the form factors. The neutron charge form factor is very sensitive to different choices of spin coupling schemes, once its magnetic moment is fitted to the experimental value. The scalar coupling between two quarks is preferred by the neutron data, when a reasonable fit of the proton magnetic momentum is found. (C) 2000 Elsevier Science B.V.
Descrição
Palavras-chave
Idioma
Inglês
Como citar
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 478, n. 1-3, p. 86-93, 2000.