An Identity for the S Matrix for a Finite Time Interval
John Charlton Polkinghorne · Physical Review · 1954
An identity [Eq. (1)] is obtained for the S matrix for a finite time interval that expresses the "scale-free" character of quantum field theory.Received 17 August 1953DOI:https://doi.org/10.1103/PhysRev.93.228©1954 American Physical Society