set_longitudinal_polarization_rcl

set_longitudinal_polarization_rcl(val, nlo=False)

Replace polarisation vectors of external photons and gluons with their corresponding normalized momentum vector.

Parameters

• val (int) –

  field string identifier

  • val = i: replace polarisation of vector particle i.

  • val = 111: replace all vector particle polarisations.

• nlo (bool) – Apply only to virtual amplitude (False default).