Arroyo Ureña, Marco AntonioHernández Tomé, G.López Castro, G.Roig Garcés, PabloRosell Escribá, IgnasiProducción Científica UCH 2021UCH. Departamento de Matemáticas, Física y Ciencias Tecnológicas2022-05-032022-05-032021-11-29Arroyo-Ureña, M.A., Hernández-Tomé, G., López-Castro, G., Roig, P. & Rosell, I. (2021). Radiative corrections to tau ->pi(K)nu(tau)[gamma] : a reliable new physics test. Physical Review D, vol. 104, i. 9 (29 nov.), art. L091502. DOI: https://doi.org/10.1103/PhysRevD.104.L0915022470-00102470-0029 (Electrónico)http://hdl.handle.net/10637/13690Este artículo se encuentra disponible en la página web de la revista en la siguiente URL: https://journals.aps.org/prd/pdf/10.1103/PhysRevD.104.L091502The ratios Rτ=P ≡ Γðτ → Pντ½γ Þ=ΓðP → μνμ½γ Þ (P ¼ π, K) provide sensitive tests of lepton universality jgτ=gμj ¼ 1 and are a useful tool for new physics searches. The radiative corrections to Rτ=P are computed following a large-NC expansion to deal with hadronic effects: Chiral Perturbation Theory is enlarged by including the lightest multiplets of spin-one heavy states such that the relevant Green functions are well behaved at high energies. We find δRτ=π ¼ ð0.18 0.57Þ% and δRτ=K ¼ ð0.97 0.58Þ%, which imply jgτ=gμjπ ¼ 0.9964 0.0038 and jgτ=gμjK ¼ 0.9857 0.0078, compatible with and at 1.8σ of lepton universality, respectively. We test unitarity and bind nonstandard effective interactions with the τ → Pντ½γ decays.application/pdfenopen accessSimetría (Física)Symmetry (Physics)Campos, Teoría clásica de.Particles (Nuclear physics)Field Theory (Physics)Partículas (Física nuclear)Artículohttps://doi.org/10.1103/PhysRevD.104.L091502https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es