| Texto completo | |
| Autor(es): |
Nogueira, J. H. Alvarenga
;
Gherardi, V.
;
Frederico, T.
;
Salme, G.
;
Colasante, D.
;
Pace, E.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 100, n. 1, p. 21-pg., 2019-07-29. |
| Resumo | |
The ladder Bethe-Salpeter equation of a bound (1/2)(+) system, composed by a fermion and a scalar boson, is solved in Minkowski space, for the first time. The formal tools are the same already successfully adopted for two-scalar and two-fermion systems, namely the Nakanishi integral representation of the Bethe-Salpeter amplitude and the light-front projection of the fulfilled equation. Numerical results are presented and discussed for two interaction kernels: (i) a massive scalar exchange and (ii) a massive vector exchange, illustrating both the correlation between binding energies and the interaction coupling constants, as well as the valence content of the interacting state, through the valence probabilities and the light-front momentum distributions. In the case of the scalar exchange, an interesting side effect, to be ascribed to the repulsion generated by the small components of the Dirac spinor, is pointed out, while for the vector exchange the manifestation of the helicity conservation opens new interesting questions to be addressed within a fully nonperturbative framework, as well as the onset of a scale-invariant regime. (AU) | |
| Processo FAPESP: | 13/26258-4 - Matéria superdensa no universo |
| Beneficiário: | Manuel Máximo Bastos Malheiro de Oliveira |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 17/05660-0 - Estudos teóricos da estrutura e reações de núcleos exóticos e sistemas de muitos corpos |
| Beneficiário: | Brett Vern Carlson |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 17/14695-1 - Explorando a estrutura de hadrons através da equação de Bethe-Salpeter no espaço de Minkowski |
| Beneficiário: | Jorge Henrique de Alvarenga Nogueira |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto |
| Processo FAPESP: | 14/19094-8 - Decaimentos de mésons pesados em três corpos e violação CP |
| Beneficiário: | Jorge Henrique de Alvarenga Nogueira |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |