Precision calculation of processes used for luminosity measurement at the ZEUS experiment

Details Precision calculation of processes used for luminosity measurement at the ZEUS experiment Precision calculation of processes used for luminosity measurement at the ZEUS experiment

2010-09-13

arxiv.org/abs/1009.2451v2

Eur.Phys.J.C71:1574,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 9 figures

Scientific paper

10.1140/epjc/s10052-011-1574-9

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.

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