Abstract
The performance of H1 1Ar calorimeter modules for energy measurement and identification of electrons are studied using CERN test data in the energy range 5 → 166 GeV. The deviations from a linear energy scaling are found to be < 1% in each of 5 stack configurations studied over four tests periods. The resolutions fitted to a function σ E / E = c 1/ E ⊕ c 2/√ E ⊕ c 3 give a weighted mean sampling contribution of c 2 = 11.1 ± 0.1% × √GeV with a noise term of c 1 = 183 ± 11 MeV and a systematic term of c 3 = 0.47 ± 0.1%. The combination of various e/ π separation estimators exploiting global or detailed shower characteristics leads typically to π contaminations < 2 × 10 −3 at 30 GeV for 96% e-efficiency.
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