[g13] Smooth P Vs Theta

[Paul Mattione]

The main conclusion from the plots I showed at the meeting the other day was that the vast majority of the observed holes in the p-vs-theta distributions are from triggering issues and cuts on the PID.  To test this, I've made plots of the p-vs-theta distributions for particles by:

For pions: select g, D -> p, p, (pi-) events (PID, missing mass cuts), require that the two protons were in different sectors and triggered.  
For protons: select g, D -> p, pi-, (p) events (PID, missing mass cuts), require that the detected proton & pion were in different sectors and triggered

I then required successful reconstruction (time-based tracking) of the missing particle, but I placed no PID cut on it; I didn't even require that it be matched to a TOF hit.  The p-vs-theta plots of these particles are located at: 

Protons: https://clasweb.jlab.org/rungroups/g13/wiki_secure/index.php/Mattione_SCEfficiencyStudies#Plots_5
Pions: https://clasweb.jlab.org/rungroups/g13/wiki_secure/index.php/Mattione_SCEfficiencyStudies#Plots_6

Voila, the distributions are smooth, except for holes in the drift chambers.  Even the panel overlap holes are gone, although they return if I require a matching TOF hit.  It appears that a TOF hit is not required for a track to pass time-based-tracking after all...

 - Paul

P.S.: DC wire map showing the DC holes: https://clasweb.jlab.org/rungroups/g13/wiki_secure/index.php/DCHoles#DC_Wire_Map