Role of P₁₃(1720) in KΣ photoproduction

Using an isobar model and the new saphir data we show that a better explanation of K⁰Σ⁺ photoproduction can be achieved by including the P₁₃(1720) resonance. We find that the inclusion of this state does not influence the K⁺Σ⁰ channel appreciably, in contrast to the other three KΣ channels, where the prominent effect is found in the K⁰Σ⁺ channel. The extracted fractional decay width is consistent with the prediction of the quark model, whose magnitude is almost one order smaller than the value given by the Particle Data Group.