Difference between revisions of "Mattione Update 09212011"

Revision as of 11:37, 21 September 2011

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

Δt vs. x

Δt vs. y

Δt vs. avg. dE

• Fit the Δt distributions to Gaussian functions, σ_t's are fit below.

σ_t vs. x

σ_t vs. y

σ_t vs. avg. dE

π^- hit only in the horizontal plane

• Δt vs. x, y, dE

Δt vs. x

Δt vs. dE

• Fit the Δt distributions to Gaussian functions, σ_t's are fit below.

σ_t vs. x

σ_t vs. dE

π^- hit only in the vertical plane

• Δt vs. x, y, dE

Δt vs. y

Δt vs. dE

• Fit the Δt distributions to Gaussian functions, σ_t's are fit below.

σ_t vs. y

σ_t vs. dE

TOF Deposited Energy Uncertainty

π^- hits in both TOF planes

• ΔdE (Measured Average - Most Probable) vs. Most Probable (NOT True) dE

ΔdE vs. Most Probable dE

• ΔdE (Measured Average - Most Probable) vs. Measured Average dE

ΔdE vs. Measured Avg. dE

• Most probable deposited energy calculated via Equation 27.10 in Section 27.2.7 of the RPP.

• I'm not sure what the best way of determining what the deposited energy uncertainty is. Ideally you would compare the measured deposited energy to the true deposited energy, and while this is known during simulation, I don't know how this number would be known during the calibration of experimental data.

TOF X Uncertainty

π^- hits in both TOF planes

• Δx vs. x

Δx vs. x

• Fit the Δx distributions to Gaussian functions, means are shown below.

μ_x vs. x