====== TTP04-07 The radiative return at Phi- and B-factories: FSR for muon pair production at next-to-leading order ======
 
 
   <hidden TTP04-07  The radiative return at Phi- and B-factories: FSR for muon pair production at next-to-leading order >   Muon pair production through the radiative return is of importance for a
 measurement of the hadronic production cross section in two ways: it provides
 an independent calibration and it may give rise to an important background for
 a measurement of the pion form factor. With this motivation the Monte Carlo
 event generator PHOKHARA is extended to include next-to-leading order radiative
 corrections to the reaction $e^+e^-\to \mu^+\mu^-\gamma$. Furthermore, virtual
 ISR corrections to FSR from pions are introduced, which extends the
 applicability of the generator into a new kinematical regime. Finally, the
 effect of photon vacuum polarization is introduced into this new version of the
 generator.
 </hidden>
|**H. Czyz, A. Grzelinska, J. H. K"uhn, G. Rodrigo**  | 
|**  Eur.Phys.J.  C39 411-420 2005  **  |
| {{preprints:2004:ttp04-07.pdf|PDF}} {{preprints:2004:ttp04-07.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0404078|arXiv]]   |
| |