July 23, 2012 PID Upgrade

Meeting Time and Place

Monday July 23, 2012 at 1:30pm At Jefferson Lab, the meeting will be held in F326

Connections

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Agenda

1. Announcements
2. Status of Hardware Designs in GEANT
3. Status of Kinematic Fitting:
4. Status of parameters for the proposed PID systems.
5. AOT

Minutes

1. The meeting started at 1:33pm with CMU, IU FSU and JLab members present.
2. Curtis announced that Mike Williams would not be connecting today as his son was born this morning.
3. Matt reported that he had received an XML design from Yi that they had put into HDGEANT. When Tom and Matt ran the Monte Carlo, it appeared to show no effect on the photon reconstruction. Using the the visualization tools, they verified that the elements are in the Monte Carlo. They are now in the process of verifying that the material is also present. With regard to the LHCb design, the LHCb XML files do not appear like they will be useful in getting the detector material into the Monte Carlo. It appears that the best approach would be to simply describe the material that is in the tracking volume and try to put that into the Monte Carlo. It was requested that Mike Williams try and distill this into a very short document so that Matt and Richard can add it to the Monte Carlo.
4. Paul reported that he is working on a more general kinematic fitter that includes both vertex and timing constraints. He expects that this will take a couple additional weeks to complete. He has not looked at the results of four-constraint fitting with kinematic fitting.
5. Nathan reported that he is continuing to try and see why the efficiency that he is finding for the old threshold cherenkov system do not agree with what Eugene found. He thinks that it may be the fact that the photon efficiency curves that he has and what Eugene used are different. In particular, what is in the Monte Carlo has low efficiency in the ultraviolet.
6. Curtis requested a that people provide a simple parametrization for the PID systems that would take as input the particle's momentum and return the mean and sigma of the probability of correctly identifying a pion, kaon and proton of that momentum. These can then be merges with the kinematic fitting. These functions should be emailed to Paul Mattione.