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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Masses of ground-state mesons and baryons, including those with heavy quarks

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Author(s):
Yin, Pei-Lin [1, 2] ; Chen, Chen [3, 4] ; Krein, Gastao [3] ; Roberts, Craig D. [5] ; Segovia, Jorge [6] ; Xu, Shu-Sheng [1, 2]
Total Authors: 6
Affiliation:
[1] Nanjing Univ Posts & Telecommun, New Energy Technol Engn Lab Jiangsu Prov, Nanjing 210023, Jiangsu - Peoples R China
[2] Nanjing Univ Posts & Telecommun, Sch Sci, Nanjing 210023, Jiangsu - Peoples R China
[3] Univ Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz 271, BR-01140070 Sao Paulo, SP - Brazil
[4] Justus Liebig Univ Giessen, Inst Theoret Phys, D-35392 Giessen - Germany
[5] Argonne Natl Lab, Phys Div, Lemont, IL 60439 - USA
[6] Univ Pablo de Olavide, Dept Sistemas Fis Quim & Nat, E-41013 Seville - Spain
Total Affiliations: 6
Document type: Journal article
Source: Physical Review D; v. 100, n. 3 AUG 9 2019.
Web of Science Citations: 1
Abstract

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)

FAPESP's process: 13/01907-0 - São Paulo Research and Analysis Center
Grantee:Sergio Ferraz Novaes
Support type: Research Projects - Thematic Grants
FAPESP's process: 15/21550-4 - Continuum strong QCD: baryon masses and partonic structure
Grantee:Chen Chen
Support type: Scholarships in Brazil - Post-Doctorate