Long-distance radiative corrections to the di-pion tau lepton decay

Details Long-distance radiative corrections to the di-pion tau lepton decay Long-distance radiative corrections to the di-pion tau lepton decay

2006-08-07

arxiv.org/abs/hep-ph/0608084v2

Phys.Rev. D74 (2006) 071301

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures. An estimate of the shift produced in the evaluation of the h.v.p. contribution to the muon anomalous magne

Scientific paper

10.1103/PhysRevD.74.071301

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.

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