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Radiative corrections to the $τ^-\to (P_1P_2)^-ν_τ$ ($P_{1,2}=π, K$) decays

Published 2 Mar 2023 in hep-ph | (2303.01362v2)

Abstract: The radiative corrections to the $\tau-\to (P_1P_2)-\nu_\tau$ ($P_{1,2}=\pi, K$) decays are calculated for the first time including the structure-dependent real photon corrections, which are obtained using Resonance Chiral Theory. Our results, whose uncertainty is dominated by the model-dependence of the resummation of the radiative corrections and the missing virtual structure-dependent contributions, allow for precise tests of CKM unitarity, lepton flavour universality and non-standard interactions.

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