Charm Estimate from the Dilepton Spectra
High Energy Physics - Phenomenology
2007-05-23 v2
Abstract
A validity of a recent estimate of an upper limit of charm production in central Pb+Pb collisions at 158 AGeV is critically discussed. Within a simple model we study properties of the background subtraction procedure used for an extraction of the charm signal from the analysis of dilepton spectra. We demonstrate that a production asymmetry between positively and negatively charged background muons and a large multiplicity of signal pairs leads to biased results. Therefore the applicability of this procedure for the analysis of nucleus-nucleus data should be reconsidered before final conclusions on the upper limit estimate of charm production could be drawn.
Cite
@article{arxiv.hep-ph/0003319,
title = {Charm Estimate from the Dilepton Spectra},
author = {M. Gazdzicki and M. I. Gorenstein},
journal= {arXiv preprint arXiv:hep-ph/0003319},
year = {2007}
}
Comments
revised version to be published in J. Phys. G