In my first study of the Transverse Shower Profile (TSP) of electrons, from data and simulation; it was observed, that the TSP of the electrons were wider in data than they were in Monte Carlo simulation. We were not able to account for this difference with gain smearing, cross-talk, or with any other effect added to the simulation. A narrowing of the data TSP, would result in a larger sample of direct photons, after making TSP cuts, in a gamma+jet analysis (since decay photons have a wider TSP).

The calibration was completed; details can be found in a previous blog. The results showed a clear reduction, in the spread of the gains for strips in eta and phi. The final test, is to compare the TSPs before and after calibration. Such plots are located below, for a selection of pT bins;

2.0 - 4.0 GeV Electron:

4.0 - 6.0 GeV Electron:

6.0 - 8.0 GeV Electron:

8.0 - 10.0 GeV Electron:

The calibration constants are ready to be uploaded in the database. There are 36,000 constants, 18,000 each in Eta and Phi. The constants are located here;

Eta Constants: /star/u/martinc/FinalCalibrationConstants2007/Private/EtaCalibrationConstants_dbscaled_restrictive.txt
Phi Constants: /star/u/martinc/FinalCalibrationConstants2007/Private/PhiCalibrationConstants_dbscaled_restrictive.txt
 

The other question, asked by Will, was with regards to the shape of the database constants;