Improvement of the Calculation of Scattering Amplitudes with External Fermions
| dc.creator | Chopin, E. | |
| dc.date | 1998-05-01 | |
| dc.date | 1998-06-17 | |
| dc.date.accessioned | 2026-07-07T04:03:47Z | |
| dc.date.available | 2026-07-07T04:03:47Z | |
| dc.description | In this paper, we present an improvement of a method for computing scattering amplitudes that include external (polarized) fermions with the following features: the formulas are quite general and work for different kinematic configurations and different external masses, they are explicitly covariant, they do not depend on a specific representation of the Dirac matrices and they have a meaningful limit when the masses tend to 0. The results presented make use of some well known formulas describing the density matrices in terms of projection operators within a more general formalism. Since our formulas intend to be as general as possible, we also take into account the possibility of a transverse polarization for massless fermions. | |
| dc.description | 27 pages, uses FEYNMAN.tex, some clarifications and orthographic corrections | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9805203 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9805203 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/47814 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Improvement of the Calculation of Scattering Amplitudes with External Fermions | |
| dc.type | text |