5 research outputs found
Heavy Quark Symmetry and the Skyrme Model
We present a consistent way of describing heavy baryons containing a heavy
quark as bound states of an soliton and heavy mesons. The resulting
mass formula reveals the heavy quark symmetry explicitly. By extending the
model to the orbitally excited states, we establish the generic structure of
the heavy baryon spectrum. As anticipated from the heavy quark spin symmetry,
the -factor denoting the hyperfine splitting constant {\em vanishes} and the
baryons with the same angular momentum of light degrees of freedom form
degenerate doublets. This approach is also applied to the pentaquark exotic
baryons, where the conventional -factor plays no more a role of the
hyperfine constant. After diagonalizing the Hamiltonian of order , we
get the degenerate doublets, which implies the vanishing of genuine hyperfine
splitting.Comment: REVTeX, 33 pages, 3 figures included, SNUTP-94/13 (revised