We should have the window defined by the acceptance cuts large enough such that the collimator defines the acceptance. We currently use the acceptance cuts
abs(hsyptar)<0.04.and.abs(hsxptar)<0.07.and.abs(hsdelta)<8.0
abs(ssyptar)<0.07.and.abs(ssxptar)<0.04.and.abs(ssdelta-2.5)<12.5
In XEM, the hsxptar acceptance cut was slightly wider, abs(hsxptar)<0.075.
Below are the SIMC (blue) and data (red) distributions together with the acceptance cuts (dashed lines). This was the hydrogen production run at the lowest Q2.
From the plots below, it seems that the hsxptar cuts should be enlarged slightly. It is also strange that the tails in hsyptar do not match very well. This is most likely because the edges in hsyptar are not kinematically allowed and this is just resolution effects. This would also explain why the full acceptance in hsyptar (+-0.04 rad) is not filled.
