SimpleππSelf-Consistent Calculation Using the Strip Approximation

Using a simple representation derived from the strip approximation by Singh and Udgaonkar (and resembling the Cini-Fubini approximation), an integral equation can be obtained for the partial-wave amplitude. This can be solved by the $\frac{N}{D}$ method. By making certain approximations, the resulting equations, when combined with the requirement of self-consistency, lead to simple algebraic equations for determining the parameters of the $\rho$ resonance. The only parameter is the width of the strip. This, however, can be calculated by using the Chew-Frautschi principle of maximum strength.