====== TTP01-13 NLO QED corrections to ISR in $e^+ e^-$ annihilation and the measurement of $\sigma(e^+ e^- \rightarrow hadrons)$ using tagged photons ======
 
 
   <hidden TTP01-13  NLO QED corrections to ISR in $e^+ e^-$ annihilation and the measurement of $\sigma(e^+ e^- \rightarrow hadrons)$ using tagged photons >   The leptonic tensor for the process $e^+ e^- \rightarrow \gamma+\gamma^*$,
 which describes the next-to-leading order virtual and soft QED corrections to
 initial state radiation in $e^+ e^-$ annihilation with emission of an extra
 virtual photon decaying into hadrons, is calculated. A Monte Carlo generator
 for the reaction $e^+ e^- \rightarrow \gamma + \pi^+ \pi^-$ has been set up
 which includes these corrections. It thus describes configurations where the
 for the reaction $e^+ e^- \rightarrow \gamma + \pi^+ \pi^-$ has been set up
 which includes these corrections. It thus describes configurations where the
 invariant mass of the hadrons plus photon is very close to $\sqrt{s}$.
 Predictions for cms energies of 1 to 10 GeV, corresponding to the energies of
 DAPHNE and B-meson factories, are presented. The possibility for an accurate
 measurement using tagged photons of $\sigma(e^+ e^- \rightarrow hadrons)$,
 which plays an important role in the theoretical description of the muon
 anomalous magnetic moment and the running of the electromagnetic coupling, is
 discussed.
 </hidden>
|**G. Rodrigo, A. Gehrmann, M. Guilleaume and J. H. K\"uhn**  | 
|**  Eur. Phys. J.  C22 81-88 2001  **  |
| {{preprints:2001:ttp01-13.pdf|PDF}} {{preprints:2001:ttp01-13.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0106132|arXiv]]   |
| |