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On new predictions of the vector-meson dominance model for the reactionsπN →ϱ0N andγN →πN

Authors
Journal
Nuclear Physics B
0550-3213
Publisher
Elsevier
Publication Date
Volume
68
Issue
2
Identifiers
DOI: 10.1016/0550-3213(74)90324-1

Abstract

Abstract It is shown that the assumption of pole vector-meson dominance for the Ball invariant amplitude having a π-meson pole is sufficient for reproducing the longitudinal amplitude of ϱ 0-production by the photoproduction amplitude at | t| < 0.1 (GeV/ c) 2. The strong k 2-dependence of the Ball invariant amplitude without the π-meson pole has been found by the deviations of theoretical predictions obtained in the VDM framework for the longitudinal ϱ 0-production amplitude from the experimental data in the region | t| > 0.1 (GeV/ c) 2. A natural explanation of the k 2-dependence in the one-pion exchange model with absorption is given. The problem of A 2-exchange is discussed.

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