Spin Symmetry Without Heavy Quarks: Hyperon Form Factors In The Large Nc Limit

الأصل · EN

In the large Nc limit, all hyperon decays involving the same quark diagram Q→ Q' are described by a single weak form factor ηQQ'(w). No assumption on the mass of Q or Q' is necessary, making our results applicable to both b→ c and c→ s transitions. This same form factor describes both ΛQ→ΛQ' and Σ⁽*⁾Q→Σ⁽*⁾Q' transitions. The (non-)commutativity between the heavy quark and the large Nc limits is briefly discussed under the definite example of Λb→Λc decay.