NS: POCA function in Helix does not work for negatively charged tracks.
JM: Added Jira item.
NG: Hmatrix upgrade. Hoping to get something from Karsten. Haven't gotten him to dial in. Will just patch it. Hope that transverse stuff would be added and make update all at once. Okay with doing incrementally. Should standardize on fixed-cone. Easy to find minimum that gives good Eres and separation. Could calculate from compact description from moliere radius. Could calculate opening angle based on the detector.
SM: Assuming hits behind main cluster won't adversly affect the hmatrix. Help by adding energy to the photon to improve the result. Might need to tune the cone to optimize it. Looks like if fit cone to the main cluster, then pickup a fraction of (???) to improve Eres.
NG: Has been some progress (claims) from Geant4 group that modifications to multiple scattering have been made for EM bug. In almost all of Tatsumi's plots, looking at scintillator/lead. In some sense, don't care, because want to make sure it works in very thin silicon.
SM: Geant4 team sees same problem?
NG: Not as pronounced, because ratio of absorber/sensitive thickness ~1, while our sensitive is much thinner.
Done any other photon analysis, e.g. efficiency as function of pT?
SM: Trying to tune-up the track-finding.
Added section to code for selecting a different clusterer, e.g. fixed cone, etc.
NG: Updates on calorimetry from Ron?
RC: Close to having general cluster analysis package?
In the process, a few utilities have been added.
Make a Final State particle list. Sounds trivial, but it varies a lot by application. Tried to put in several options.
Generator final state particle list for FastMC, trying to generate reconstructed particle list.
Simulator final state particle list, end of the chain. Everything that happends before the calorimeter. Options on particles not from endpoint. RZ cylinder option to ignore all beyond some RZ.
Tested-out and seems to work.
Uses MCParticleClassifier.
Fill lists with cluster information about final state MCParticles.
Another list that holds information for every cluster, holds MCParticle info.
NG: Updates from Uriel?
UN: Only SiD models are working. Not working because crashes.
NG: Send us crash to debug.
UN: Don't have code to match track to a cell by position.
RC: Others have asked for this, too. Have a volunteer to do it. (Matthew Charles)
UN: Also have a person who is writing this code. Can provide help on this.
Which tile to remove the hit from for charged tracks.
Already have code that does it at 75% efficiency.
SM: E/H. Increase the H portion by using Uranium or some dense absorber. Could also decrease E with low Z material. In RPC, place G10 in front of the gas may reduce E in E/H for RPC version of calorimeter. Problem will be that don't want to reduce E, because already way too low. Looked at different in reponse N, Nbar, klong. Optimize for RPC version, only way to do it is reduce E. Some tradeoff there.
Having meetings 1/week with Fermilab, Adam Perra. Starting at the beginning. Looked at contributions of jet algorithm/fragmentation to pflow. Look just like results at Chicago meeting.