| Issue |
EPJ Web Conf.
Volume 241, 2020
The 12th International Workshop on the Physics of Excited Nucleons (NSTAR 2019)
|
|
|---|---|---|
| Article Number | 02002 | |
| Number of page(s) | 8 | |
| Section | Theory | |
| DOI | https://doi.org/10.1051/epjconf/202024102002 | |
| Published online | 22 September 2020 | |
https://doi.org/10.1051/epjconf/202024102002
On SU(3)F positive-parity octet and decuplet baryons
Institut für Theoretische Physik, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
* Corresponding author: Chen.Chen@theo.physik.uni-giessen.de
Published online: 22 September 2020
A continuum approach to the three valence-quark bound-state problem in quantum field theory, employing parametrisations of the necessary kernel elements, is used to compute the spectrum and Poincarö- covariant wave functions for all flavour-SU(3) octet and decuplet baryons and their first positive-parity ex citations. Such analyses predict the existence of nonpointlike, dynamical quark-quark (diquark) correlations within all baryons; and a uniformly sound description of the systems studied is obtained by retaining flavour- antitriplet-scalar and flavour-sextet-pseudovector diquarks. The analysis predicts the existence of positive- parity excitations of the 𝚵, 𝚵*, Ω baryons, with masses, respectively (in GeV): 1.84(08), 1.89(04), 2.05(02). These states have not yet been empirically identified. This body of analysis suggests that the expression of emergent mass generation is the same in all u, d, s baryons and, notably, that dynamical quark-quark correla tions play an essential role in the structure of each one. It also provides the basis for developing an array of predictions that can be tested in new generation experiments.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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