[G12] energy corrections

[Saini, Mukesh]

Another thing,

Let's consider 2 extremes of Incoming electron beam energies of our data 5.700 and 5.730 GeV. A range of 30 MeV. We expect the majority of our data around 5.714 so this seemed like appropriate extremes.

We consider 2 extreme cases of detected photon for both cases, One at 95% electron energy loss and the other at 20%  electron energy loss which are both expected to be detected in the tagger.

The 1st tagger correspond to 95%  electron energy loss and 767th paddle corresponds to 20%  electron energy loss.

Electron Beam      1st Tagger Paddle     Last Tagger Paddle
     GeV                     GeV                             GeV
5.700                        5.415                           1.140

5.730                        5.4435                          1.146

This means the Photons of highest energies are most susceptible to being identified with the wrong paddle number if I use a single tagger-id to photon-energy lookup table, and that's where I want them to be most accurate. I think the recommended way to do these corrections should be to reskim the ntuples and always have the Tagger Paddle ID in case you don't already have it.

Mukesh.