====== TTP01-32 Radiative return at NLO and the measurement of the hadronic cross-section in electron positron annihilation ======
 
 
   <hidden TTP01-32  Radiative return at NLO and the measurement of the hadronic cross-section in electron positron annihilation > Electron-positron annihilation into hadrons plus an energetic photon from 
 initial state radiation allows the hadronic cross-section to be measured 
 over a wide range of energies. The full next-to-leading order QED corrections 
 for the cross-section for e^+ e^- annihilation into a real tagged photon and 
 a virtual photon converting into hadrons are calculated where the tagged 
 photon is radiated off the initial electron or 
 positron. This includes virtual and soft photon
 corrections to the process e^+ e^- \to \gamma +\gamma^* and the emission 
 of two real hard photons: e^+ e^- \to \gamma + \gamma + \gamma^*. 
 A Monte Carlo generator has been constructed, which incorporates these 
 corrections and simulates the production of two charged pions or muons 
 plus one or two photons. Predictions are presented for centre-of-mass 
 energies between 1 and 10 GeV, corresponding to the energies of DAPHNE, 
 CLEO-C and B-meson factories.   
 </hidden>
|**G. Rodrigo, H. Czyz, J.H. K"uhn, M. Szopa**  | 
|**  Eur.Phys.J.  C24 71-82 2002  **  |
| {{preprints:2001:ttp01-32.pdf|PDF}} {{preprints:2001:ttp01-32.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0112184|arXiv]]   |
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