| Texto completo | |
| Autor(es): |
Ydrefors, E.
;
Alvarenga Nogueira, J. H.
;
Gigante, V.
;
Frederico, T.
;
Karmanov, V. A.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physics Letters B; v. 770, p. 131-137, JUL 10 2017. |
| Citações Web of Science: | 3 |
| Resumo | |
The Bethe-Salpeter equation for three bosons with zero-range interaction is solved for the first time. For comparison the light-front equation is also solved. The input is the two-body scattering length and the outputs are the three-body binding energies, Bethe-Salpeter amplitudes and light-front wave functions. Three different regimes are analyzed: (i) For weak enough two-body interaction the three-body system is unbound. (ii) For stronger two-body interaction a three-body bound state appears. It provides an interesting example of a deeply bound Borromean system. (iii) For even stronger two-body interaction this state becomes unphysical with a negative mass squared. However, another physical (excited) state appears, found previously in light-front calculations. The Bethe-Salpeter approach implicitly incorporates three-body forces of relativistic origin, which are attractive and increase the binding energy. (C) 2017 The Author(s). Published by Elsevier B.V. (AU) | |
| Processo FAPESP: | 16/25143-7 - Problemas de dois e três corpos relativísticos no espaço de Minkowski em (2+1) e (3+1) dimensões |
| Beneficiário: | Emanuel Arthur Ydrefors |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| 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 |
| Processo FAPESP: | 15/22701-6 - Teoria relativística de poucos corpos a suas aplicações em hádrons e no núcleo |
| Beneficiário: | Tobias Frederico |
| Modalidade de apoio: | Auxílio à Pesquisa - Pesquisador Visitante - Internacional |