Resumo

SANCHEZ, E.  e  MORENO, M.. Projective method for spinorial techniques: unifying calculational framework for Dirac amplitudes. Rev. mex. fis. [online]. 2019, vol.65, n.6, pp.639-650.  Epub 30-Maio-2020. ISSN 0035-001X.  https://doi.org/10.31349/revmexfis.65.639.

There have been numerous methodologies to perform the calculation of spin-dependent amplitudes for Dirac particles. All of them have their own advantages and properties, but there is no general framework to address the analytic calculation of such amplitudes. In this work, we use the closure property of massive spinors to present a new and general approach to compute transition amplitudes for general spin states. We argue that this perspective can be used to reformulate all other techniques and to relate all of them. Particularly, it is shown that the massless spinor and the helicity spinor techniques can be formulated through this language. Finally, we give an example of this calculation as a procedure by computing the spin-dependent amplitude for the Compton process and comment some of the strengths of our method.

Palavras-chave : Spinor techniques; Dirac amplitudes; compton scattering; 11.80.-m; 11.80.Cr; 11.55.-m; 13.60.Fz.

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