Year: 2019
Type: article
Abstract: Using a confining, symmetry-preserving regularization of a $\mathrm{vector}\ifmmode\times\else\texttimes\fi{}\mathrm{vector}$ contact interaction, we compute the spectra of ground-state pseudoscalar and vector $(f\overline{g})$ mesons, scalar and axial-vector $(fg)$ diquarks, and ${J}^{P}=1/{2}^{+},3/{2}^{+}$ $(fgh)$ baryons, where $f,g,h\ensuremath{\in}{u,d,s,c,b}$. 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.
Authors: Pei-Lin Yin, Chen Chen, Gastão Krein, Craig D. Roberts, Jorge Segovia, Shu-Sheng Xu
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: U.S. Department of Energy, Fundação de Amparo à Pesquisa do Estado de São Paulo, National Natural Science Foundation of China, Government of Jiangsu Province, Ministerio de Economía y Competitividad, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Natural Science Foundation of Jiangsu Province, Nanjing University of Posts and Telecommunications, Universidad de Huelva, Nanjing University, Office of Science, Nuclear Physics
Awards: G102163711, G1760870335, G2287611682, São Paulo Research and Analysis Center, G262962599, G2896472831, G3588731312, G4008194675, G4402799499, G4411211920, G4827397938, G498139845, G531553406, G5456387165, G5523144874, G6848031779, G6918803902, G7085298806, G7418193128, G7419093424, G8571344375, G880751848, G969889393, G993149817
OpenAlex ID: W2918535038