Large-angle Bhabha scattering and luminosity at Daphne
Abstract
The accurate knowledge of luminosity at e^+ e^- flavour factories requires the precision calculation of the Bhabha cross section at large scattering angles. In order to achieve a theoretical accuracy at the 0.1% level, the relevant effect of QED radiative corrections is taken into account in the framework of the Parton Shower method, which allows exclusive event generation. On this scheme, a Monte Carlo event generator (BABAYAGA) is developed for data analysis. To test the reliability of the approach, a benchmark calculation, including exact O(alpha) corrections and higher-order leading logarithmic contributions, is developed as well, implemented in a Monte Carlo integrator (LABSPV) and compared in detail with the BABAYAGA predictions. The effect of initial-state and final-state radiation, O(alpha) next-to-leading and higher-order leading corrections is investigated and discussed in the presence of realistic event selections. The theoretical precision of BABAYAGA is estimated to be at the 0.5% level.
Keywords
Cite
@article{arxiv.hep-ph/0001131,
title = {Large-angle Bhabha scattering and luminosity at Daphne},
author = {C. M. Carloni Calame and C. Lunardini and G. Montagna and O. Nicrosini and F. Piccinini},
journal= {arXiv preprint arXiv:hep-ph/0001131},
year = {2007}
}
Comments
8 pages, LaTeX, 4 eps figures. Contribution to the proceedings of the Workshop on Physics and Detectors for DAPHNE, Frascati, November 16-19, 1999