get_squared_amplitude_rcl

get_squared_amplitude_rcl(npr, order, pow=None, als=None)

Extracts the computed value of the summed squared amplitude with pow being order in the fundamental couplings at loop-order order for the process with process number npr.

Parameters:
  • npr (int) – process number
  • order (str) –

    loop-order of the contribution:

    • order = ‘LO’ : tree squared amplitude
    • order = ‘NLO’ : loop squared amplitude
    • order = ‘NLO-D4’: loop squared amplitude, bare loop contribution
    • order = ‘NLO-CT’: loop squared amplitude, counterterms contribution
    • order = ‘NLO-R2’: loop squared amplitude, rational terms contribution
    • order = ‘NLO-IR1’: loop squared amplitude, IR single pole contribution
      Requires to enable IR pole computation via set_compute_ir_poles_rcl()
    • order = ‘NLO-IR2’: loop squared amplitude, IR double pole contribution
      Requires to enable IR pole computation via set_compute_ir_poles_rcl()
  • pow/als (list/integer) – array with values representing the powers in fundamental couplings in the order as dictated by the model file, e.g. [2, 3] \(\equiv g_\mathrm{s}^2 e^3\), or, if supported by the model, the power in terms of als \(\propto g_\mathrm{s}^2\) only (power in \(e\) is determined automatically from the underlying process)
Returns:

A2

Return type:

(float)

This routine can be called only after compute_process_rcl for process with process number npr