Abstract
An efficient Monte Carlo method for photon bremsstrahlung calculations in semileptonic decays is described. This method is useful for order-α radiative correction calculations, and for event generations in off-line Monte Carlo simulation programs. The order-α bremsstrahlung amplitude in hyperon semileptonic decays is given by using the Low-theorem, and the bremsstrahlung amplitude squared is calculated for unpolarized decays. Numerical calculation results are presented for n → pe v, μ → e v, v μ, Σ − → ne v and Λ → pe v decays. The general features of the Monte Carlo method might be useful for photon bremsstrahlung calculations in other decay and collision processes.
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