Integracion del cuadrivector momento asociado al foton en el bremsstrahlung del decaimiento semileptonico debil

Contrary to what is usually expected, it is shown that it is possible to integrate the variables associated to the photon prior to the evaluation of the traces of the rate of transition, for the bremsstrahlung af a charged hyperan semileptanic decay process. Expressing the results in cavariant terms, allows us to factorize and reduce to a minimum the amaunt of traces. This procedure leads to a substancial reductian of the algebraic work in this type of calculations.