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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.)

Parity partners in the baryon resonance spectrum

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Author(s):
Lu, Ya ; Chen, Chen ; Roberts, Craig D. ; Segovia, Jorge ; Xu, Shu-Sheng ; Zong, Hong-Shi
Total Authors: 6
Document type: Journal article
Source: Physical Review C; v. 96, n. 1 JUL 28 2017.
Web of Science Citations: 17
Abstract

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. (AU)

FAPESP's process: 15/21550-4 - Continuum strong QCD: baryon masses and partonic structure
Grantee:Chen Chen
Support type: Scholarships in Brazil - Post-Doctorate