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Long-distance radiative corrections to the di-pion tau lepton decay

F. Flores-Baez·A. Flores-Tlalpa·G. Lopez Castro·G. Toledo Sanchez
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Abstract

We evaluate the model-dependent piece of O(alpha) long-distance radiative corrections to tau^- \to π^- π^0ν_τ decays by using a meson dominance model. We find that these corrections to the di-pion invariant mass spectrum are smaller than in previous calculations based on chiral perturbation theory. The corresponding correction to the photon inclusive rate is tiny (-0.15%) but it can be of relevance when new measurements reach better precision.

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F. Flores-Baez, A. Flores-Tlalpa, G. Lopez Castro, G. Toledo Sanchez. 2006-10-16. Long-distance radiative corrections to the di-pion tau lepton decay. https://doi.org/10.1103/physrevd.74.071301

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