TY - JOUR
T1 - Masses of orbitally excited baryons in large Nc QCD
AU - Carlson, Carl E.
AU - Carone, Christopher D.
AU - Goity, José L.
AU - Lebed, Richard F.
N1 - Funding Information:
CEC thanks the National Science Foundation for support under Grant PHY-9600415; CDC thanks the NSF for support under Grant PHY-9800741; and JLG similarly thanks the NSF for support under Grant HRD-9633750. Both JLG and RFL thank the Department of Energy for support under Contract DE-AC05-84ER40150.
PY - 1998/10/22
Y1 - 1998/10/22
N2 - We present the first phenomenological study of the masses of orbitally excited baryons in large Nc QCD. Restricting here to the nonstrange sector of the l = 1 baryons, the 1/Nc expansion is used to order and select a basis of effective operators that spans the nine observables (seven masses and two mixing angles). Fits are performed using subsets of the complete set of nine operators, including corrections up to 0(1/Nc) where leading order is Nc1. This study shows that the 1/Nc expansion provides an excellent framework for analyzing the mass spectrum, and uncovers a new hierarchy of operator contributions.
AB - We present the first phenomenological study of the masses of orbitally excited baryons in large Nc QCD. Restricting here to the nonstrange sector of the l = 1 baryons, the 1/Nc expansion is used to order and select a basis of effective operators that spans the nine observables (seven masses and two mixing angles). Fits are performed using subsets of the complete set of nine operators, including corrections up to 0(1/Nc) where leading order is Nc1. This study shows that the 1/Nc expansion provides an excellent framework for analyzing the mass spectrum, and uncovers a new hierarchy of operator contributions.
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U2 - 10.1016/S0370-2693(98)00992-7
DO - 10.1016/S0370-2693(98)00992-7
M3 - Article
AN - SCOPUS:0346855659
SN - 0370-2693
VL - 438
SP - 327
EP - 335
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 3-4
ER -