https://doi.org/10.1140/epjc/s10052-011-1574-9
Special Article - Tools for Experiment and Theory
Precision calculation of processes used for luminosity measurement at the ZEUS experiment
1
DESY, Hamburg, Germany
2
NCPHEP, Minsk, Belarus
* e-mail: tobias.haas@desy.de
Received:
17
September
2010
Published online:
2
March
2011
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.
© Springer-Verlag / Società Italiana di Fisica, 2011
