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| — | preprints:2004:ttp04-20 [2016/03/17 11:03] (current) – created - external edit 127.0.0.1 |
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| | ====== TTP04-20 Modeling the Pion and Kaon Form Factors in the Timelike Region ====== |
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| | <hidden TTP04-20 Modeling the Pion and Kaon Form Factors in the Timelike Region > New, accurate measurements of the pion and kaon electromagnetic form factors |
| | are expected in the near future from experiments at electron-positron |
| | colliders,using the radiative return method. We construct a model for the |
| | timelike pion electromagnetic form factor, that is valid also at momentum |
| | transfers far above the $\rho$ resonance. The ansatz is based on vector |
| | dominance and includes a pattern of radial excitations expected from dual |
| | resonance models.The form factor is fitted to the existing data in the timelike |
| | region, continued to the spacelike region and compared with the measurements |
| | there and with the QCD predictions. Furthermore, the model is extended to the |
| | kaon electromagnetic form factor. Using isospin and SU(3)-flavour symmetry |
| | relations we extract the isospin-one contribution and predict the kaon weak |
| | form factor accessible in semileptonic tau decays. |
| | </hidden> |
| | |**Christine Bruch, Alexander Khodjamirian, Johann, H. Kuhn** | |
| | |** Eur.Phys.J. C39 41-54 2005 ** | |
| | | {{preprints:2004:ttp04-20.pdf|PDF}} {{preprints:2004:ttp04-20.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0409080|arXiv]] | |
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