SM: Got sigma of 2.7 GeV at the Zpole after tuning up pflow algo.
Photons from hmatrix.
Neutrals are leftovers.
Distribution is symmetric. (usually not) Fit with double gaussian.
Photon finder was not picking up the tail of the photons. Wanted to modify fixed cone to use instead.
To find photons, just allow NN to skip some layers.
MC: Not really an 80/20% split on the 2 gaussians.
RC: What were parameters for finding photons using NN?
SM: Looking...
MC: Which detector?
SM: cdcaug05, because RPCs are difficult to work with for this application.
SM: Distance 2 & 2 in transverse dimension. ~Moliere radius. Number of layers = 5.
No hits in tail, because missing hits a few layers away.
Min # cells = 8.
10 cell clusters into hmatrix and used for photons.
Ratio of E_cluster/E_actual. Apply 1.04 E correction.
RC: For neutrals, did do clustering, not just take all the hits and use their energy?
SM: Yes, use the cluster energy. Calculate the energy by using a different sampling fraction in the ecal. Similar to hits vs. energy as done by RC. Number of hits sampling fractions for ecal hits, e.g. GeV/hit.
Allow to go across ~20% of hcal to find clusters.
For ecal, use 7 layers for the hadrons. Reclustered with different parameters after removing photon clusters and MIP hits.