40 research outputs found
Operator Analysis of L=1 Baryon Masses in Large N_c QCD
We consider in detail the mass operator analysis for the nonstrange L=1
excited baryons in large N_c QCD. We present a straightforward procedure for
constructing the large N_c baryon wavefunctions, and provide complete analytic
expressions for the matrix elements of all the independent isosinglet mass
operators. We discuss the relationship between the old-fashioned operator
analyses based on nonrelativistic SU(6) symmetry and the modern large N_c
approach, which has a firmer theoretical foundation. We then suggest a possible
dynamical interpretation for the subset of operators preferred strongly by the
data.Comment: 36 pages LaTe