Tau Radiative Decays in the Light Front Quark Model

Details Tau Radiative Decays in the Light Front Quark Model Tau Radiative Decays in the Light Front Quark Model

2003-10-14

arxiv.org/abs/hep-ph/0310161v1

Phys.Rev. D68 (2003) 093001

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 4 Figures, to be published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.68.093001

We study the decays of $\tau^- \to \nu_{\tau} P^-\gamma (P=\pi^-, K^-)$ in the light front quark model. We calculate the form factors and use them to evaluate the decay widths. We find that, in the standard model, the decay widths are $1.62\times 10^{-2} (3.86\times10^{-3}) \Gamma_{\tau^- \to \nu_{\tau} \pi^-}$ and $1.91\times 10^{-3} (5.38\times 10^{-4}) \Gamma_{\tau^- \to \nu_{\tau} K^-}$ with the cuts of $E_{\gamma}=50 (400)$ MeV and $t_{0}=800 (1200)$ MeV for $\tau^- \to \nu_{\tau} \pi^- \gamma$ and $\tau^- \to \nu_{\tau} K^- \gamma$, respectively. We also show that with including the radiative decay widths, the experimental rate for $\tau^-\to \nu_\tau P^-$ can be explained.

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