Precision calculation of processes used for luminosity measurement at the ZEUS experiment
arXiv:1009.2451 · doi:10.1140/epjc/s10052-011-1574-9
Abstract
The process pe -> pe+gamma 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 gamma-e coincidence are analyzed. We also calculate the process pe -> pel+l- which contributes to the background in the electron tagger.
12 pages, 9 figures