MINOS
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The idea is to look for stopping muons in cosmic data. Then a study of the de/dx at the end of the track is to be done. The hope is to find some characteristics that can be used to separate pions and muons in beam samples. This is important since the proportion of 'muon-like' pions has been found through Monte Carlo studies (Ruben) to be much higher than we expected.
The angular distribution of muons in cosmic data. The big spikes in all of these plots are from PS muons.
My code to select muons looks for muons that enter the side or top of the detector in both views and stop at least 3 strips away from the opposite edge. I also cut muons that pass through the first or last 3 planes.
Only 27 muons make it. (0.15%)
This seems a bit low.
(x = percentage of the way along the track, y = percentage total energy deposited )
Statistics are low but there appears to be no sign of an increase in energy deposition towards the end of the track.
Energy deposition in last plane hit is the furthest left point.
Although it seems to follow the general trend we see in beam muons, with an upturn at the end of the track, the magnitude is much lower than expected and a bit questionable as a result.
Beam muons