Klein-Gordon operators are used to isolate the poles of time-ordered correlation functions in order to compute this quantity via the LSZ reduction formula.
Using a perturbative expansion in this quantity to perform a canonical change of variables on the Lagrangian of light-cone Yang-Mills theory reproduces the CSW selection rules. The Parke-Taylor formula gives the "maximally helicity violating" form of this quantity. The inner product of the on-shell four-momentum with this quantity is zero, according to the Ward identity. Klein-Gordon operators are used to isolate the poles of time-ordered correlation functions in order to compute this quantity via the LSZ reduction formula. This quantity is proportional to the Fourier transform of potential energy under the Born approximation. The wavefunction and this quantity are expressed as weighted sums of spherical harmonics in the partial wave expansion method. For 10 points, name this quantity whose magnitude squared gives the di猴ferential cross section of a scattering process.
Using a perturbative expansion in this quantity to perform a canonical change of variables on the Lagrangian of light-cone Yang-Mills theory reproduces the CSW selection rules.
scattering amplitudes [or probability amplitudes; or S-matrix elements]