2016/02/01 by M. Fael, Matteo Fael, M. Passera +2
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ex #hep-ph
paper · pdf · doi:10.48550/arxiv.1602.00457
10 pages, 1 figure, to appear in the proceedings of the 12th International Symposium on Radiative Corrections (Radcor 2015) and LoopFest XIV (Radiative Corrections for the LHC and Future Colliders)
arxiv created 2016/02/01 · openalex publication_date 2016/02/01 · arxiv updated 2016/02/02 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The branching fractions of radiative leptonic τ decays (τ→ l νν γ, l=e,μ) were recently measured by the Babar collaboration with a relative error of about 3%. The measurement of the branching ratio B (τ→ e ν νγ), for a minimum photon energy of 10 MeV in the τ rest frame, differs from our recent SM prediction by 3.5 standard deviations, whereas our result agrees with Babar's value for B (τ→ μν νγ). Our predictions also agree with the measurement of B (μ→ e ν νγ) by the MEG collaboration. We also report on a recent proposal to test the τ dipole moments via precise measurements of radiative leptonic τ decays at high-luminosity B factories.