https://doi.org/10.1140/epjc/s10052-021-09097-6
Regular Article - Theoretical Physics
Masses of positive- and negative-parity hadron ground-states, including those with heavy quarks
1
School of Science, Nanjing University of Posts and Telecommunications, 210023, Nanjing, China
2
School of Physics, Nanjing University, 210093, Nanjing, Jiangsu, China
3
Institute for Nonperturbative Physics, Nanjing University, 210093, Nanjing, Jiangsu, China
4
Dpto. Sistemas Físicos, Químicos y Naturales, Univ. Pablo de Olavide, 41013, Seville, Spain
Received:
24
February
2021
Accepted:
17
March
2021
Published online:
17
April
2021
A symmetry-preserving treatment of a vector 
vector contact interaction is used to compute spectra of ground-state 
mesons, their partner diquark correlations, and 
(fgh) baryons, where 
. Results for the leptonic decay constants of all mesons are also obtained, including scalar and pseudovector states involving heavy quarks. The spectrum of baryons produced by this chiefly algebraic approach reproduces the 64 masses known empirically or computed using lattice-regularised quantum chromodynamics with an accuracy of 1.4(1.2)%. It also has the richness of states typical of constituent-quark models and predicts many baryon states that have not yet been observed. The study indicates that dynamical, nonpointlike diquark correlations play an important role in all baryons; and, typically, the lightest allowed diquark is the most important component of a baryon’s Faddeev amplitude.
© The Author(s) 2021
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3
