Trying to understand this I firstly asked Chris to apply his fitting function to the MC. The result for the summed ("green" + "clear") histogram is shown in this plot.
This agrees with what I got from the landau fit within 1%.
Then I simulated pure energy losses of 2 GeV positron
in our scintillator in the native for GEANT energy units -- MeV without
any
conversions, attenuation length correction pmt simulations
etc. Here's the plot.
So the mean of this distribution is 97.6 MeV. If calibrated with beam muons our mip value should be roughly 2MeV ± 15% and therefore we should expect the corresponding mip distribution with a mean of 50-60 for 2 GeV positrons/electrons.
So at the moment data seems to have too high mip values.
Could it be that for the hits summed at both ends an incorrect adc2mip
convertion factor is used???
proverka