A dual description of the reactions K±p → K*0π±p for incident momenta from 2.7 to 12.7 GeV/cfor incident momenta from 2.7 to 12.7 GeV/c

Abstract

A model is considered in which the reactions K±p → K*0π±p are simultaneously described in terms of a dual five-point function forp-wave exchanges plus dual-resonance amplitudes for pion exchange and pomeron exchange. Various versions of the model are considered. A convenient parametrization of the imaginary parts of Regge trajectories is introduced. Four free parameters are adapted to obtain good agreement with a vast amount of experimental data, containing effectivemass and four-momentum transfer distributions. These cover the incident-momentum interval from 2.7 to 12.7 GeV/c, and have been subjected to a variety of kinematical cuts in the different experiments which are taken into account in the analysis. Total cross-sections and their composition in terms of contributions of the various amplitudes are predicted. The Q-bump is reproduced out of K*(1420), diffraction dissociation of the K-meson (Q(1300)) and also nondiffractive pion exchange background. The L-bump is shown to be particularly sensitive to interference between pomeron exchange and the remaining part of the amplitude.