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Table 1 Mean and RMS widths of the longitudinal momentum distributions for six beams compared with the corresponding simulations

From: Characterisation of the muon beams for the Muon Ionisation Cooling Experiment

Beam Data Simulation
Mean p z MeV/c RMS p z MeV/c Mean p z MeV/c RMS p z MeV/c
μ (6,140) 176.4±2.3 22.8±0.3 173.7±2.1 19.5±0.2
(6,200) 232.2±2.5 23.6±0.3 229.3±0.8 21.0±0.1
(6,240) 271.0±3.7 24.5±0.3 270.5±0.9 22.2±0.1
μ + (6,140) 176.5±2.0 24.4±0.3 176.6±3.7 25.5±0.5
(6,200) 229.2±2.4 25.9±0.3 230.8±1.4 28.9±0.2
(6,240) 267.7±2.9 25.8±0.3 269.2±4.2 31.3±0.5