Noun
S-matrix (plural S-matrixes)
(physics) Abbreviation of scattering matrix.
Particle-path representation Feynman diagrams were originally discovered by Feynman, by trial and error, as a way to represent the contribution to the S-matrix from different classes of particle trajectories. Source: Internet
The S-matrix approach was started by Werner Heisenberg in the 1940s as a way of constructing a theory that did not rely on the local notions of space and time, which Heisenberg believed break down at the nuclear scale. Source: Internet
This led physicists to abandon the S-matrix approach for the strong interactions. Source: Internet
While regularized versions useful for approximate computations (for example lattice gauge theory ) exist, it is not known whether they converge (in the sense of S-matrix elements) in the limit that the regulator is removed. Source: Internet