Incorrect smearing and parameters for homogeneous Ecal smearing

[bschmookler]

Environment: (where does this bug occur, have you tried other environments)

• Which branch (often main for latest released): Main
• Which version (or HEAD for the most recent on git): HEAD
• Any specific OS or system where the issue occurs? N/A
• Any special versions of ROOT or Geant4? N/A

There is a difference between what is currently done for the homogeneous ECal smearing, and what we very recently put into Juggler here.

There was a typo in the previous Juggler implementation, which was fixed. It is now consistent with what is shown, for example, in slide 7 here.

In addition, on that same slide, the first parameter has units of E^(1/2); so for dd4hep/juggler, which use GeV as energy units, it should be 0.1/sqrt(1000) = 0.00316. This is what we recently put here.

These need to be made consistent in EICrecon in this file.

[rymilton]

Can this get addressed by somebody please? Issue #204 is going to be addressed by copying the corrected ecal files.

[jizhongling]

I verified that this issue has been fixed.

[rymilton]

Resolved with PR #236.