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arXiv · hep-ph/0309243

Influence of a Z+(1540) resonance on K+N scattering

J. Haidenbauer·G. Krein
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Abstract

The impact of a (I=0, J^P=1/2^+) Z^+(1540) resonance with a width of 5 MeV or more on the K+N (I=0) elastic cross section and on the P01 phase shift is examined within the KN meson-exchange model of the Juelich group. It is shown that the rather strong enhancement of the cross section caused by the presence of a Z^+ with the above properties is not compatible with the existing empirical information on KN scattering. Only a much narrower Z^+ state could be reconciled with the existing data -- or, alternatively, the Z^+ state must lie at an energy much closer to the KN threshold.

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J. Haidenbauer, G. Krein. 2003-09-21. Influence of a Z+(1540) resonance on K+N scattering. https://doi.org/10.1103/physrevc.68.052201

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