Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 71, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-011-1574-9
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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(+/-) -> pe(+/-)l(-)l(+) which contributes to the background in the electron tagger.
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