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      https://www.ias.ac.in/article/fulltext/pram/006/01/0029-0033

    • Keywords

       

      ψ - γ vertex; radiative decays; photoproduction; total cross section

    • Abstract

       

      It is pointed out that the coupling characterizing theψ-γ vertex must change substantially between the limits,ψ on mass-shell which occurs inψe+e and photon on mass-shell which is relevant in radiative decays likeψππγ, ψηγ and photoproduction ofψ. This has the consequence that the value ofψN total cross section must be larger than what is inferred from the use of naive vector dominance in photoproduction.

    • Author Affiliations

       

      K (xxxV) L Sarma1 G Rajasekaran1 J Pasupathy1

      1. Tata Institute of Fundamental Research, Bombay - 400005
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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