Difference between revisions of "Mattione Update 09042013"

Revision as of 16:30, 3 September 2013

CDC Track Finding

Single π⁺ Track

= Single π⁺ Reconstruction (trackeff_hists plugin)

• The below plots show the track reconstruction efficiency and resolution 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 (NEW trackeffv2 plugin)

• The below plots show the track reconstruction efficiency and resolution 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)

Current (09/01/13) Code

ρ Mesons

γp→π⁺π⁺π^-(n)

γp→π⁺π⁺π^-π^-π⁰(p) (b1pi)

bggen (pythia)

γp→K⁺K⁺Ξ^-