Electron identification using the TOPAZ detector at TRISTAN

Details Electron identification using the TOPAZ detector at TRISTAN Electron identification using the TOPAZ detector at TRISTAN

1995-01-11

arxiv.org/abs/hep-ex/9501004v1

Nucl.Instrum.Meth.A365:143-157,1995

Physics

High Energy Physics

High Energy Physics - Experiment

32 pages, latex format (article), 24 figures, submitted for publication.

Scientific paper

10.1016/0168-9002(95)00400-9

We present an electron-identification method using the time-projection chamber and the lead-glass calorimeter in the TOPAZ detector system. Using this method we have achieved good electron identification against hadron backgrounds over a wide momentum range in the hadronic events produced by both single-photon exchange and two-photon processes. Pion-rejection factors and electron efficiencies were 163 and 68.4\% for high-$P_T$ electrons and 137 and 42.7\% for low-$P_T$ electrons in the single-photon-exchange process, and 8600 and 36.0\% for the two-photon process, respectively.

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