The quark model and b baryons

The Quark Model and b Baryons

The recent observation at the Tevatron of Σ±b (uub and ddb) baryons within 2 MeV of the predicted Σb − Λb splitting and of Ξ−b (dsb) baryons at the Tevatron within a few MeV of predictions has provided strong confirmation for a theoretical approach based on modeling the color hyperfine interaction. The prediction of M(Ξ−b ) = 5790 to 5800 MeV is reviewed and similar methods used to predict the ...

Combined nonrelativistic constituent quark model and heavy quark effective theory study of semileptonic decays of b and b baryons

1550-7998=20 We present the results of a nonrelativistic constituent quark model study of the semileptonic decays b ! c l l and b ! c l l (l e; ). We work on coordinate space, with baryon wave functions recently obtained from a variational approach based on heavy quark symmetry. We develop a novel expansion of the electroweak current operator, which supplemented with heavy quark effective the...

Pentaquark baryons in SU(3) quark model

We study the SU(3) group structure of pentaquark baryons which are made of four quarks and one antiquark. The pentaquark baryons form 1, 8, 10, 10, 27, and 35 multiplets in SU(3) quark model. First, the flavor wave functions of all the pentaquark baryons are constructed in SU(3) quark model and then the flavor SU(3) symmetry relations for the interactions of the pentaquarks with three-quark bar...

Baryons in a Chiral Constituent Quark Model

In the low-energy regime light and strange baryons should be considered as systems of constituent quarks with confining interaction and a chiral interaction that is mediated by Goldstone bosons as well as by vector and scalar mesons. The flavorspin structure and sign of the short-range part of the spin-spin force reduces the SU(6)FS symmetry down to SU(3)F × SU(2)S , induces hyperfine splitting...

A relativisti quark model of baryons