We report on a high-precision calculation of the Bhabha process in QED, of interest for precise luminosity determination of low-energy electron-positron colliders. The calculation is based on the matching of exact next-to-leading order corrections with a Parton Shower algorithm. The structure of the algorithm (implemented in an improved version of the event generator BABAYAGA) is illustrated, with a discussion on the resulting theoretical uncertainty, of the order of 0.1 %.
@article{arxiv.hep-ph/0609313,
title = {Matching Parton Shower and matrix elements in QED},
author = {G. Balossini and C. M. Carloni Calame and G. Montagna and O. Nicrosini and F. Piccinini},
journal= {arXiv preprint arXiv:hep-ph/0609313},
year = {2007}
}
Comments
4 pages. Talk given at the XXXIII International Conference on High Energy Physics, ICHEP06, Moscow, 26 July - 02 August, 2006