General formulas for invariant functions describing generalized γn → γn reactions within the method of effective lagrangians

A. Yu Loginov, V. N. Stibunov

Research output: Contribution to journalArticle


The crossed channels of generalized γN → γN reactions are considered. The coefficients in the transformation from independent helicity amplitudes to invariant functions are calculated. Explicit expressions for the invariant functions are derived with allowance for the contribution from the Born diagrams in the s, u, and t channels and the diagrams for six resonances in the s and u channels. It is shown that the calculated invariant functions satisfy the crossing-symmetry requirements.

Original languageEnglish
Pages (from-to)292-305
Number of pages14
JournalPhysics of Atomic Nuclei
Issue number2
Publication statusPublished - 1 Jan 2005


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics

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