JournalsprimsVol. 15, No. 3pp. 767–772

Extended Landau Variety and the Singularity Spectrum of Position-Space Feynman Amplitudes

  • Takahiro Kawai

    Kyoto University, Japan
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Abstract

It is shown that the singularity spectrum of (generalized) position-space Feynman amplitude Δ_D_(x; λ) is confined to the extended Landau variety (introduced by Kashiwara-Kawai [8], [9] and Kashiwara-Kawai-Stapp [11](0)) associated with the Feynman diagram D(0), which is obtained by replacing all the masses associated with the internal lines of D with zero, at least under the assumption that the diagram D is external.

Cite this article

Takahiro Kawai, Extended Landau Variety and the Singularity Spectrum of Position-Space Feynman Amplitudes. Publ. Res. Inst. Math. Sci. 15 (1979), no. 3, pp. 767–772

DOI 10.2977/PRIMS/1195187875