Matching perturbative and parton shower corrections to Bhabha process at flavour factories

By G. Balossini, C. Calame, G. Montagna, O. Nicrosini, F. Piccinini. 2006

161 citations recorded by the source corpus.

We report on a high-precision calculation of the Bhabha process in Quantum Electrodynamics, of interest for precise luminosity determination of electron-positron colliders involved in R measurements in the region of hadronic resonances. The calculation is based on the matching of exact next-to-leading order corrections with a Parton Shower algorithm. The accuracy of the approach is demonstrated in comparison with existing independent calculations and through a detailed analysis of the main components of theoretical uncertainty, including two-loop corrections, hadronic vacuum polarization and light pair contributions. The calculation is implemented in an improved version of the event generator BABAYAGA with a theoretical accuracy of the order of 0.1%. The generator is now available for high-precision simulations of the Bhabha process at flavour factories.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9f6cb21958a4cf74a43d69397a551ff811e4f93f

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In Nuclear and High Energy Physics

1. Atlas Collaboration
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4. A. Gritsan
5. P. Robbe
6. David Kirkby
7. N. Roe
8. O. Buchmueller

Citations in the corpus

• The BABAR Detector: Upgrades, Operation and Performance (2013, methodology): “BHWIDE [31] was used to generate1165 the Bhabha events, while BABAYAGA [32] was used to1166 estimate systematic errors.”