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 looporderorder
for the process with process numbernpr
.Parameters:  npr (int) – process number
 order (str) –
looporder of the contribution:
 order = ‘LO’ : tree squared amplitude
 order = ‘NLO’ : loop squared amplitude
 order = ‘NLOD4’: loop squared amplitude, bare loop contribution
 order = ‘NLOCT’: loop squared amplitude, counterterms contribution
 order = ‘NLOR2’: loop squared amplitude, rational terms contribution
 order = ‘NLOIR1’: loop squared amplitude, IR single pole contribution
 Requires to enable IR pole computation via
set_compute_ir_poles_rcl()
 order = ‘NLOIR2’: 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