Long-distance radiative corrections to the di-pion tau lepton decay
High Energy Physics - Phenomenology
2009-11-11 v2
Abstract
We evaluate the model-dependent piece of O(alpha) long-distance radiative corrections to tau^- \to \pi^- \pi^0\nu_{\tau} decays by using a meson dominance model. We find that these corrections to the di-pion invariant mass spectrum are smaller than in previous calculations based on chiral perturbation theory. The corresponding correction to the photon inclusive rate is tiny (-0.15%) but it can be of relevance when new measurements reach better precision.
Cite
@article{arxiv.hep-ph/0608084,
title = {Long-distance radiative corrections to the di-pion tau lepton decay},
author = {F. Flores-Baez and A. Flores-Tlalpa and G. Lopez Castro and G. Toledo Sanchez},
journal= {arXiv preprint arXiv:hep-ph/0608084},
year = {2009}
}
Comments
4 pages, 2 figures. An estimate of the shift produced in the evaluation of the h.v.p. contribution to the muon anomalous magnetic moment is added. Version to appear in Phys. Rev. D