Mattione Update 09042013

Single π⁺ Track

Single π⁺ Reconstruction: Current (Trunk) Code, trackeff_hists plugin

• The below plots show the track reconstruction efficiency and resolution for the trunk using the single-track scripts plugin (trackeff_hists).
• However, this efficiency is extremely misleading:
  • If a track is reconstructed using any of the hits that were on the thrown track it is considered "found."
  • This is regardless of whether the reconstructed track momentum is anywhere close to the thrown values.

Time-Based Tracks (trackeff_hists plugin)

Momentum Resolution (trackeff_hists plugin)

Single π⁺ Reconstruction: Current (Trunk) Code, NEW trackeffv2 plugin

• The below plots show the track candidate and time-based track reconstruction efficiency for the trunk using a new plugin (trackeff_hists).
• This plugin compares matches all of the thrown and reconstructed particles in the event, and requires that their momentum be "close."
  • "Close" for track candidates is defined as: Δp/p < 20%, Δθ < 40 degrees, Δφ < 40 degrees, ΔVertex-Z < 1 km
    • For thrown tracks with θ < 5 degrees, there is no cut on Δφ
  • "Close" for time-based tracks is defined as: Δp/p < 10%, Δθ < 15 degrees, Δφ < 15 degrees, ΔVertex-Z < 10 cm

Track Candidates (trackeffv2 plugin)

Time-Based Tracks (trackeffv2 plugin)

• Note that the degradation of the efficiency at forward angles matches the track resolution plot in the previous section.
  • If I expand the requirements for the "Close" window, the efficiency increases, and the chosen parameters were somewhat arbitrary.

Single π⁺ Reconstruction: NEW Spiral Code

• The below plots show the track candidate and time-based track reconstruction efficiencies for the new spiral code.
• Note: The trackeffv2 plugin compares matches all of the thrown and reconstructed particles in the event, and requires that their momentum be "close."
  • "Close" for track candidates is defined as: Δp/p < 20%, Δθ < 40 degrees, Δφ < 40 degrees, ΔVertex-Z < 1 km
    • For thrown tracks with θ < 5 degrees, there is no cut on Δφ
  • "Close" for time-based tracks is defined as: Δp/p < 10%, Δθ < 15 degrees, Δφ < 15 degrees, ΔVertex-Z < 10 cm

Track Candidates Efficiency (Spiral Code)

Time-Based Track Efficiency (Spiral Code)

• The below plots show the improvements in the track candidate and time-based track reconstruction efficiencies with the new spiral code.

Track Candidate Efficiency Improvement	Zoomed Track Candidate Efficiency Improvement
Time-Based Track Efficiency Improvement	Zoomed Time-Based Track Efficiency Improvement

γp→π⁺π^-p (ρ Mesons)

• The below plots show the track candidate and time-based track reconstruction efficiencies for both track finding codes, and the improvement.
• Note: The definition of closeness is the same as before (see the single-track section).
• Events were generated at beam energy of 9 GeV and a t-slope of 5.0

Protons

Thrown Protons

Stage	Efficiency - Current Code	Efficiency - Spiral Code	Improvement - Current Code	Improvement - Spiral Code
Track Candidates	File:Mattione Update 09042013 Efficiency Candidates Rho Proton Current.png 250px	File:Mattione Update 09042013 Efficiency Candidates Rho Proton Spiral.png 250px	File:Mattione Update 09042013 EfficiencyDiff Candidates Rho Proton.png 250px	File:Mattione Update 09042013 EfficiencyDiffZoomed Candidates Rho Proton.png 250px
Time-Based Tracks	File:Mattione Update 09042013 Efficiency TimeBased Rho Proton Current.png 250px	File:Mattione Update 09042013 Efficiency TimeBased Rho Proton Spiral.png 250px	File:Mattione Update 09042013 EfficiencyDiff TimeBased Rho Proton.png 250px	File:Mattione Update 09042013 EfficiencyDiffZoomed TimeBased Rho Proton.png 250px

π⁺

Thrown π+'s

Stage	Efficiency - Current Code	Efficiency - Spiral Code	Improvement - Current Code	Improvement - Spiral Code
Track Candidates	File:Mattione Update 09042013 Efficiency Candidates Rho PiPlus Current.png 250px	File:Mattione Update 09042013 Efficiency Candidates Rho PiPlus Spiral.png 250px	File:Mattione Update 09042013 EfficiencyDiff Candidates Rho PiPlus.png 250px	File:Mattione Update 09042013 EfficiencyDiffZoomed Candidates Rho PiPlus.png 250px
Time-Based Tracks	File:Mattione Update 09042013 Efficiency TimeBased Rho PiPlus Current.png 250px	File:Mattione Update 09042013 Efficiency TimeBased Rho PiPlus Spiral.png 250px	File:Mattione Update 09042013 EfficiencyDiff TimeBased Rho PiPlus.png 250px	File:Mattione Update 09042013 EfficiencyDiffZoomed TimeBased Rho PiPlus.png 250px

π^-

Thrown π-'s

Stage	Efficiency - Current Code	Efficiency - Spiral Code	Improvement - Current Code	Improvement - Spiral Code
Track Candidates	File:Mattione Update 09042013 Efficiency Candidates Rho PiMinus Current.png 250px	File:Mattione Update 09042013 Efficiency Candidates Rho PiMinus Spiral.png 250px	File:Mattione Update 09042013 EfficiencyDiff Candidates Rho PiMinus.png 250px	File:Mattione Update 09042013 EfficiencyDiffZoomed Candidates Rho PiMinus.png 250px
Time-Based Tracks	File:Mattione Update 09042013 Efficiency TimeBased Rho PiMinus Current.png 250px	File:Mattione Update 09042013 Efficiency TimeBased Rho PiMinus Spiral.png 250px	File:Mattione Update 09042013 EfficiencyDiff TimeBased Rho PiMinus.png 250px	File:Mattione Update 09042013 EfficiencyDiffZoomed TimeBased Rho PiMinus.png 250px