Radiative two-pion decay of the tau lepton

Details Radiative two-pion decay of the tau lepton Radiative two-pion decay of the tau lepton

2005-11-28

arxiv.org/abs/hep-ph/0511315v1

Phys.Rev. D72 (2005) 113003

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 8 figures, submitted for publication

Scientific paper

10.1103/PhysRevD.72.113003

We consider the bremsstrahlung and model-dependent contributions to the radiative decay $\tau^- \to \pi^-\pi^0\nu_{\tau}\gamma$ in the context of a meson dominance model. We focus on several observables related to this decay, including the branching ratio and the photon and di-pion spectra. Particular attention is paid to the sensitivity of different observables upon the effects of model-dependent contributions and of the magnetic dipole moment of the $\rho^-(770)$ vector meson. Important numerical differences are found with respect to results obtained in the framework of chiral perturbation theory.

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