Retrieving "Scalar Fermion" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Ghost Field

   Linked via "scalar fermions"

   Ghost fields are strictly non-physical entities. They do not correspond to any measurable particle, nor do they couple to standard matter fields in a manner that would allow for their direct detection. This non-observability stems from the fact that their presence in scattering amplitudes is always balanced by the contributions from the unphysical polarization states of the gauge fields they are designed to cancel [1].
   If a calculation erroneously omits the ghost field contribution, the resulting scattering amplitude …