Abstract
The process pe ±→pe ± γ with the photon emitted along the electron beam axis is used for luminosity measurement at HERA. In this paper the process is calculated including one-loop QED radiative corrections. In the ZEUS experiment, both the electron and the photon can be detected. Therefore both photon and electron spectra with and without the γ–e coincidence are analyzed. We also calculate the process pe ±→pe ± l − l + which contributes to the background in the electron tagger.
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Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License (https://creativecommons.org/licenses/by-nc/2.0), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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Haas, T., Makarenko, V. Precision calculation of processes used for luminosity measurement at the ZEUS experiment. Eur. Phys. J. C 71, 1574 (2011). https://doi.org/10.1140/epjc/s10052-011-1574-9
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DOI: https://doi.org/10.1140/epjc/s10052-011-1574-9