Track by track analysis, compare calibration production SL21b, production SL21c, and TFG21j for 2019AuAu19GeV, day 057.

Legend

The plots are designed to answer on the following questions:

• What is difference between efficiencies for "new" and "old" reconstruction for both global and primary tracks versus kinematical variables ?
• What globals and primaries track relative reconstruction efficiency of "new" production with respect to "old" one?
• What is the track parameters and their errors dependence on the track kinematics (φ, η, 1/pT) ?
• What is difference in the primary vertex positions?

• Filled marker for "new" production, opened marker for "old" one.
• Black marker for positive tracks, red markers for negative tracks.

• The efficiency is calculated for the matched tracks i.e. tracks have one to one match or if there is a multiple match than it is taken the first matched pair only.
• The clones are tracks with more than 1 matched track.
• The lost track are ones without match.

• Practically no difference in the global track reconstruction efficiencies between SL21b and SL21c, and significant difference between SL21c and TFG21j (≈ 4%) due to new CA (Fig. 1-3), especially for high η and low p_T.
• The same is true for primary tracks (Fig. 10-12).
• There is no difference in momentum (p_T) between SL21b and SL21c, but there is ≈ 0.2% shift in momentum between SL21c and TFG21j due to rescaling of magnetic field (Fig. 27 and 29).
• There is a difference in the primary vertex Z-position between SL21b and SL21c ≈ 500 μm (Fig. 33) due to different model for the trigger time offset calculations.

1. Tracks

Track by track analysis

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