Role of P-13(1720) in K Sigma photoproduction - art. no. 038201

Using an isobar model and the new SAPHIR data we show that a better explana tion of K(0)Sigma(+) photoproduction can be achieved by including the P-13( 1720) resonance. We find that the inclusion of this state does not influenc e the K(+)Sigma(0) channel appreciably, in contrast to the other three K Si gma channels, where the prominent effect is found in the K(0)Sigma(+) chann el. The extracted fractional decay width is consistent with the prediction of the quark model, whose magnitude is almost one order smaller than the va lue given by the Particle Data Group.