Examples are given which prove the ICARUS detector quality through relevant physics measurements. We study the μ decay energy spectrum from a sample of stopping μ events acquired during with fine granularity, hence, the precise measurement of the range and dE/dx of the μ with high sampling rate. This information is used to compute the calibration factors needed for the full calorimetric reconstruction of the events. The Michel ρ parameter is then measured by comparison of the experimental and Monte Carlo simulated μ decay spectra, obtaining ρ = 0.72 ± 0.06 (stat.) ± 0.08 (syst.). The energy resolution for electrons below ∼ 50 MeV is finally extracted from the simulated sample, obtaining (Eemeas − EeMC)/EeMC = 11%/E[MeV] ⊕ 2%.
MEASUREMENT OF THE MU DECAY SPECTRUM WITH THE ICARUS LIQUID ARGON TPC
CAVANNA, FLAVIO
2004-01-01
Abstract
Examples are given which prove the ICARUS detector quality through relevant physics measurements. We study the μ decay energy spectrum from a sample of stopping μ events acquired during with fine granularity, hence, the precise measurement of the range and dE/dx of the μ with high sampling rate. This information is used to compute the calibration factors needed for the full calorimetric reconstruction of the events. The Michel ρ parameter is then measured by comparison of the experimental and Monte Carlo simulated μ decay spectra, obtaining ρ = 0.72 ± 0.06 (stat.) ± 0.08 (syst.). The energy resolution for electrons below ∼ 50 MeV is finally extracted from the simulated sample, obtaining (Eemeas − EeMC)/EeMC = 11%/E[MeV] ⊕ 2%.Pubblicazioni consigliate
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