Abstract
We have performed an experimental study of electron identification using an emulsion cloud chamber detector with electron-enriched π− beams at 2 and 4 GeV/c produced by the proton synchrotron source at CERN. This study shows that the efficiency of electron identification is about 90% with little (6%) contamination from pions. These results are in agreement with those obtained using a Cherenkov counter and are reproduced well by the simulation.
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