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- Title
PROSPECTS FOR DISCOVERY OF THE τ<sup>-</sup> → π<sup>-</sup>ℓ<sup>+</sup>ℓ<sup>-</sup>ν<sub>τ</sub> DECAYS.
- Authors
ROIG, PABLO
- Abstract
We study the phenomenology of the τ- → π-ντℓ+ℓ- decays (ℓ = e, μ), predicting the respective branching ratios and di-lepton invariant-mass spectra. In addition to the model-independent ( QED) contributions, we investigate the structure-dependent ( SD) terms, encoding features of the hadronization of QCD currents. The relevant form factors are evaluated by supplementing Chiral Perturbation Theory with the inclusion of the lightest (axial-)vector resonance multiplet as dynamical fields. The Lagrangian couplings are fully predicted requiring the known QCD asymptotic behavior to the relevant Green functions and associated form factors in the limit of an infinite number of colours. As a consequence we predict that the τ- → π-ντe+e- decays should be discovered soon while this is not granted for the ℓ = μ case.
- Publication
International Journal of Modern Physics: Conference Series, 2014, Vol 35, p-1
- ISSN
2010-1945
- Publication type
Article
- DOI
10.1142/S2010194514604608