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Matching Parton Shower and matrix elements in QED

G. Balossini·C. M. Carloni Calame·G. Montagna·O. Nicrosini·F. Piccinini
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Abstract

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 %.

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G. Balossini, C. M. Carloni Calame, G. Montagna, O. Nicrosini, F. Piccinini. 2006-09-29. Matching Parton Shower and matrix elements in QED. https://arxiv.org/abs/hep-ph/0609313

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