2013/04/25 by N. Matagne, Nicolas Matagne, Fl. Stancu · 4 citations
Physics and Astronomy · #Atomic physics #Baryon #Excited state #High-Energy Particle Collisions Research #Parity (physics) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quark #hep-ph
paper · pdf · doi:10.1103/physrevd.87.076012
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 87(7) (American Physical Society) · 18 pages, title slightly changed by the Physical Review D Editor
openalex publication_date 2013/04/25 · arxiv created 2014/06/12 · arxiv updated 2014/06/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A simple procedure within the 1/Nc expansion method where all the Nc quarks are treated on the same footing has been found successful in describing mixed symmetric negative parity baryon states belonging to the [70,\ensuremathℓ^\ensuremath-] multiplets of the N=1 and 3 bands. Presently it is applied to mixed symmetric positive parity [70,0+] and [70,2+] multiplets of the N=2 band. We search for the most dominant terms in the mass formula. The results are compared to those obtained in the procedure where the system is separated into a core and an excited quark. We find that both the spin and flavor operators of the entire system of Nc quarks play dominant roles in describing the data, like for negative parity states. As a by-product we present the contribution of the leading spin-flavor singlet term as a function of the band number, which hints at distinct Regge trajectories for the symmetric and mixed symmetric states.