βenergy spectrum in charged-hyperon semileptonic decays with improved radiative corrections

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Abstract
Our aim in this paper is to obtain a theoretical expression for the radiative corrections to the electron energy spectrum of hyperon β decay that is model independent and includes all terms of order αq/π, where q is the four-momentum transfer. The resulting formula is suitable for model-independent analysis of very-high-statistics experiments, without any experimental constraint on the detection of hard inner-bremsstrahlung photons.