| Texto completo | |
| Autor(es): |
Yin, Pei-Lin
;
Chen, Chen
;
Krein, Gastao
;
Roberts, Craig D.
;
Segovia, Jorge
;
Xu, Shu-Sheng
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 100, n. 3, p. 19-pg., 2019-08-09. |
| Resumo | |
Using a confining, symmetry-preserving regularization of a vector x vector contact interaction, we compute the spectra of ground-state pseudoscalar and vector of (f (g) over bar) mesons, scalar and axial-vector (fg) diquarks, and J(P) = 1/2(+), 3/2(+) (fgh) baryons, where f, g, h is an element of {u, d, s, c, b}. The diquark correlations are essentially dynamical and play a key role in formulating and solving the three-valence-quark baryon problems. The baryon spectrum obtained from this largely algebraic approach reproduces the 22 known experimental masses with an accuracy of 2.9(2.4)%. It also possesses the richness of states typical of constituent-quark models, predicting many heavy-quark baryons not yet observed. This study indicates that diquark correlations are an important component of all baryons; and owing to the dynamical character of the diquarks, it is typically the lightest allowed diquark correlation that defines the most important component of a baryon's Faddeev amplitude. (AU) | |
| Processo FAPESP: | 15/21550-4 - QCD Forte no Continuo: Massas e Estrutura Partonia de Barions |
| Beneficiário: | Chen Chen |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 13/01907-0 - Centro de Pesquisa e Análise de São Paulo |
| Beneficiário: | Sergio Ferraz Novaes |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |