Micro-Analytic Structure of the $S$-Matrix and Related Functions
Masaki Kashiwara, Takahiro Kawai, Henry Pierce Stapp · Publications of the Research Institute for Mathematical Sciences · 1976
In this report we summalize some recent results and make a conjecture on the micro-analytic structure of the S-matrix and related functions. The details of this report shall appear elsewhere. We refer the reader to Kawai-Stapp [4], [5] for the definition of the symbols and terminologies used here. In order to determine the micro-analytic structure of the 5-matrix and other bubble diagram functions we first examine the singularity spectrum of the phase space integral ID(p) = ^n(Pi-, °,Pn) associated with a (stable particle) Landau diagram D with n external lines, N internal lines and n' vertices. A formal definition of the phase space integral ID(J>} is given as follows: