ar X iv : h ep - p h / 03 09 24 3 v 1 2 1 Se p 20 03 Influence of a Z + ( 1540 ) resonance on K + N scattering

Abstract

The impact of a (I = 0, J = 12 + ) 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 Jülich 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. PACS NUMBERS: 13.75.Jz, 12.39.Pn, 14.20.Jn, 21.30.-x, 12.40.-y

Cite this paper

@inproceedings{Haidenbauer2003arXI, title={ar X iv : h ep - p h / 03 09 24 3 v 1 2 1 Se p 20 03 Influence of a Z + ( 1540 ) resonance on K + N scattering}, author={Johann Haidenbauer and G. Krein}, year={2003} }