Parity partners in the baryon resonance spectrum
Abstract
Here, we describe a calculation of the spectrum of flavor-SU(3) octet and decuplet baryons, their parity partners, and the radial excitations of these systems, made using a symmetry-preserving treatment of a vector x vector contact interaction as the foundation for the relevant few-body equations. Dynamical chiral symmetry breaking generates nonpointlike diquarks within these baryons and hence, using the contact interaction, flavor-antitriplet scalar, pseudoscalar, vector, and flavor-sextet axial-vector quark-quark correlations can all play active roles. The model yields reasonable masses for all systems studied and Faddeev amplitudes for ground states and associated parity partners that sketch a realistic picture of their internal structure: ground-state, even-parity baryons are constituted, almost exclusively, from like-parity diquark correlations, but orbital angular momentum plays an important role in the rest-frame wave functions of odd-parity baryons, whose Faddeev amplitudes are dominated by odd-parity diquarks.
- Authors:
-
- Nanjing Univ., Jiangsu (China)
- Univ. Estadual Paulista, Sao Paulo (Brazil)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Technische Univ. Munchen, Garching (Germany)
- Nanjing Univ., Jiangsu (China); Nuclear Physics and Cosmology, Jiangsu (China)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1389644
- Alternate Identifier(s):
- OSTI ID: 1373321
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Volume: 96; Journal Issue: 1; Journal ID: ISSN 2469-9985
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
Lu, Ya, Chen, Chen, Roberts, Craig D., Segovia, Jorge, Xu, Shu -Sheng, and Zong, Hong -Shi. Parity partners in the baryon resonance spectrum. United States: N. p., 2017.
Web. doi:10.1103/PhysRevC.96.015208.
Lu, Ya, Chen, Chen, Roberts, Craig D., Segovia, Jorge, Xu, Shu -Sheng, & Zong, Hong -Shi. Parity partners in the baryon resonance spectrum. United States. https://doi.org/10.1103/PhysRevC.96.015208
Lu, Ya, Chen, Chen, Roberts, Craig D., Segovia, Jorge, Xu, Shu -Sheng, and Zong, Hong -Shi. Fri .
"Parity partners in the baryon resonance spectrum". United States. https://doi.org/10.1103/PhysRevC.96.015208. https://www.osti.gov/servlets/purl/1389644.
@article{osti_1389644,
title = {Parity partners in the baryon resonance spectrum},
author = {Lu, Ya and Chen, Chen and Roberts, Craig D. and Segovia, Jorge and Xu, Shu -Sheng and Zong, Hong -Shi},
abstractNote = {Here, we describe a calculation of the spectrum of flavor-SU(3) octet and decuplet baryons, their parity partners, and the radial excitations of these systems, made using a symmetry-preserving treatment of a vector x vector contact interaction as the foundation for the relevant few-body equations. Dynamical chiral symmetry breaking generates nonpointlike diquarks within these baryons and hence, using the contact interaction, flavor-antitriplet scalar, pseudoscalar, vector, and flavor-sextet axial-vector quark-quark correlations can all play active roles. The model yields reasonable masses for all systems studied and Faddeev amplitudes for ground states and associated parity partners that sketch a realistic picture of their internal structure: ground-state, even-parity baryons are constituted, almost exclusively, from like-parity diquark correlations, but orbital angular momentum plays an important role in the rest-frame wave functions of odd-parity baryons, whose Faddeev amplitudes are dominated by odd-parity diquarks.},
doi = {10.1103/PhysRevC.96.015208},
journal = {Physical Review C},
number = 1,
volume = 96,
place = {United States},
year = {Fri Jul 28 00:00:00 EDT 2017},
month = {Fri Jul 28 00:00:00 EDT 2017}
}
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