The Spin--Symmetry of the Quark Model
Patrick J. O'Donnell, Q. P. Xu, Humphrey K. K. Tung
Abstract
Corrections to the exact heavy--quark symmetry results are expected to follow the 1/mQ mass effect of the heavy--quark. We show, by an explicit calculation, that there is something other than the mass effect that suppresses the breaking of the spin symmetry.
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