Pion and kaon role in $τ$ decays, g_μ-2, the running of $α_{QED}$ and the muonium hyperfine splitting

Details Pion and kaon role in $τ$ decays, g_μ-2, the running of $α_{QED}$ and the muonium hyperfine splitting Pion and kaon role in $τ$ decays, g_μ-2, the running of $α_{QED}$ and the muonium hyperfine splitting

2002-02-21

arxiv.org/abs/hep-ph/0202203v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 4 figures

Scientific paper

10.1016/S0920-5632(03)01842-5

We make use of recent accurate results obtained for the pion and kaon vector
form factors within a chiral unitary approach in order to calculate the decay
widths of the $\tau$ lepton to these mesons and also to evaluate the
contribution of this two mesons to the anomalous magnetic moment of the muon,
the running of the fine structure constant and the muonium hyperfine splitting.

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