首页 | 本学科首页   官方微博 | 高级检索  
     检索      


On new predictions of the vector-meson dominance model for the reactions πN → ϱ0N and γN → πN
Authors:NN Achasov  GN Shestakov
Institution:Department of Theoretical Physics, Institute of Mathematics, USSR Academy of Sciences, Siberian Division, Novosibirsk 90, USSR
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 ?0-production by the photoproduction amplitude at |t| < 0.1 (GeV/c)2. The strong k2-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 ?0-production amplitude from the experimental data in the region |t| > 0.1 (GeV/c)2. A natural explanation of the k2-dependence in the one-pion exchange model with absorption is given. The problem of A2-exchange is discussed.
Keywords:
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号