| Texto completo | |
| Autor(es): |
Dai, L. R.
;
Oset, E.
;
Feijoo, A.
;
Molina, R.
;
Roca, L.
;
Torres, A. Martinez
;
Khemchandani, K. P.
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 105, n. 7, p. 11-pg., 2022-04-21. |
| Resumo | |
We study the interaction of the doubly bottom systems BB, B*B, BsB, B-s*B, B*B*, B*B-S, B*B-s*, BsBs, BsBs*, B-s*B-s* by means of vector meson exchange with Lagrangians from an extension of the local hidden gauge approach. The full s-wave scattering matrix is obtained implementing unitarity in coupled channels by means of the Bethe-Salpeter equation. We find poles below the channel thresholds for the attractively interacting channels B*B in I = 0, B-s*B - B*B-s in I = 1/2, B* B* in I = 0, and B-s*B* in I = 1/2, all of them with J(P) = 1(+). For these cases the widths are evaluated identifying the dominant source of imaginary part. We find binding energies of the order of 10-20 MeV, and the widths vary much from one system to the other: of the order of 10-100 eV for the B* B system and B-s*B - B* B-s, about 6 MeV for the B*B* system and of the order of 0.5 MeV for the B-s*B* system. (AU) | |
| Processo FAPESP: | 19/17149-3 - Enfrentando problemas de física de hádrons com teorias de campos efetivas |
| Beneficiário: | Alberto Martinez Torres |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 19/16924-3 - Propriedades e interações dos hádrons |
| Beneficiário: | Kanchan Pradeepkumar Khemchandani |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |