Observation of the beam-size effect at HERA
High Energy Physics - Experiment
2010-11-01 v1 High Energy Physics - Phenomenology
Abstract
A precise measurement of the spectrum of the photons from bremsstrahlung with the ZEUS luminosity monitor at HERA is reported. The measurement shows a reduced rate compared to the Bethe-Heitler spectrum for photon energies below 5~GeV. This suppression, called the beam-size effect, is explained by the finite transverse size of the beam overlap relative to the typical impact parameter in the process of bremsstrahlung at HERA energies.
Cite
@article{arxiv.hep-ex/9504003,
title = {Observation of the beam-size effect at HERA},
author = {Krzysztof Piotrzkowski},
journal= {arXiv preprint arXiv:hep-ex/9504003},
year = {2010}
}
Comments
12 pages, latex