Regge intercepts of multiquark systems in Feynman's bremsstrahlung analogy

An extension of Feynman's bremsstrahlung analogy to general quark-line diagrams gives a highest Regge intercept ${\alpha }_n\mathrm{}\left(0\right)=1-\left(\frac{1}{2}\right)\Sigma i^{}{C}_i$ for an $n$-quark system, where $C_i$ is a flavor-dependent constant associated with each quark in the system. Consequences for multiquark spectroscopy are discussed.