Integration of the photon momentum for the Bremsstrahlung of a semileptonic decay process

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 of charged hyperon semileptonic decay process. Expressing the results in covariant terms, allows us to factorize and reduce to a minimum the amount of traces. This procedure leads to a substantial reduction of the algebraic work in this type of calculations. (author)