MHV amplitudes
IN QUANTUM FIELD THEORY, AN AMPLITUDE WITH N MASSLESS EXTERNAL GAUGE BOSONS, WHERE N–2 GAUGE BOSONS HAVE A PARTICULAR HELICITY AND THE OTHER 2 HAVE THE OPPOSITE HELICITY
MHV Amplitudes; CSW rules; Parke–Taylor amplitudes; Parke-Taylor amplitudes
In theoretical particle physics, maximally helicity violating amplitudes (MHV) are amplitudes with n massless external gauge bosons, where n-2 gauge bosons have a particular helicity and the other two have the opposite helicity. These amplitudes are called MHV amplitudes, because at tree level, they violate helicity conservation to the maximum extent possible.