the potential for a closure check

[gfacini]

It came up during the EPS rush that the in-situ calibration was not applied correctly. We save the pT of the jets at each point in the calibration. Data gets the instiu correction while MC does not. The step before insitu is GSC. So it would be nice to see the Z+Jet balance when the MC and Data are both using the GSC pT and compare this to the fully calibrated balance.

Both before b-tagging and after b-tagging are of interest.