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

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

2003-09-21

arxiv.org/abs/hep-ph/0309243v1

Phys.Rev.C68:052201,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, RevTeX, 3 eps figures

Scientific paper

10.1103/PhysRevC.68.052201

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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