compute_spin_correlation_rcl

compute_spin_correlation_rcl(npr, p, j, v, order='LO')

Computes the spin-correlated summed squared amplitude, where the polarization vector of particle j, necessarily being a gluon or photon, is is substituted for the user-defined polarization vector v.

Parameters:
  • npr (int) – process number
  • p (float[l][4]) – external momenta of the process with l legs
  • j (int) – photon/gluon leg
  • v (complex[4]) – photon/gluon polarization vector
Returns:

(A2sc, momcheck)

Return type:

(float, bool)