Baryon spectrum of the N = 4 band and N+pi decay widths; Semirelativistic quark model, hyperfine quark-quark interaction; role of three body confinement
Abstract :
[en] Previous studies of non-strange baryons are extended to resonances of mass beyond 2 GeV, belonging to the N = 4 band. The framework is a semi-relativistic constituent quark model. The quark-quark interaction contains a Coulomb plus linear confinement term and a short range spin-spin term. It turns out that the string tension value of 1 GeV/fm fixed previously in the N<4 bands is compatible with the N = 4 band. It is shown that the three-body confinement potential plays an important role in describing the inner structure of the band. The decay widths are calculated in a flux-tube breaking mechanism and compared to data and other models.
Stancu, Floarea ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
