Mattione Update 09212011
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Contents
Summary
- OBJECTIVE: I'm updating the reconstruction uncertainties to improve the particle-ID algorithms and support the kinematic fitting analyses.
- PLAN: I'm comparing the generated and reconstructed track parameters in the TOF, BCAL, and FCAL systems to determine the uncertainties.
- STATUS: TOF Uncertainties are below.
TOF Time Uncertainty
π- hits in both TOF planes
- Δt vs. x, y, average dE
- Fit the Δt distributions to Gaussian functions, σt's are fit below.
π- hit only in the horizontal plane
- Δt vs. x, y, dE
- Fit the Δt distributions to Gaussian functions, σt's are fit below.
π- hit only in the vertical plane
- Δt vs. x, y, dE
- Fit the Δt distributions to Gaussian functions, σt's are fit below.
TOF Deposited Energy Uncertainty
π- hits in both TOF planes
- ΔdE (Measured Average - Most Probable) vs. Most Probable (NOT True) dE
- ΔdE (Measured Average - Most Probable) vs. Measured Average dE
- Most probable deposited energy calculated via Equation 27.10 in Section 27.2.7 of the RPP.
- Perhaps the best way to do it is to look at the dE distribution as a function of track βγ, and get the uncertainty from the width of that distribution. How would the energy uncertainty be calibrated using real data?
TOF X Uncertainty
π- hits in both TOF planes
- Δx vs. x
- Fit the Δx distributions to Gaussian functions, means are shown below.
- I'm not sure, but I think the skews may be due to the cut used to identify when the hits matched between planes.