CMS Tracking Efficiency from Tag & Probe in Early Run-3 data

(CMS DP-DP-2022/046)

Abstract

In this note the CMS tracking performance are calculated using the tag-and-probe method exploiting the Z → µ+µ− resonance.

Link to the public DP note

Results are published in the DP note CMS-DP-2022-046.

Example of a Tag and Probe Fit procedure

The fit in Passing and Failing Probes plots for the probe standalone muon transverse momentum bin (40 , 50) GeV as a function of the invariant mass of the Tag and Probe muons in the “Tracker-only Seeded Tracks” collection. Data are shown in black dots.

Tracking performance in Early Run-3 data

Plots	Description
	The tracking efficiency as a function of pseudo-rapidity 𝜂 of probe standalone muons in the “All Tracks” collection. Data (black dots) and Madgraph DY (light blue rectangles). The uncertainties shown are statistical and are frequently smaller than the marker size. Systematic uncertainties are not yet evaluated and can be significant. Due to a larger mass resolution for η > 1.1 and η < - 1.1, a fit mass range extension to [40, 150] GeV has been used allowing more events off the peak for the background component fit.
	The tracking efficiency as a function of number of primary vertices in the “All Tracks” collection. Data (black dots) and Madgraph DY (light blue rectangles). The uncertainties shown are statistical and are frequently smaller than the marker size. Systematic uncertainties are not yet evaluated and can be significant.
	The tracking efficiency as a function of transverse momentum of standalone muons in the “All Tracks” collection. Data (black dots) and Madgraph DY (light blue rectangles). The uncertainties shown are statistical and are frequently smaller than the marker size. Systematic uncertainties are not yet evaluated and can be significant.
	The tracking efficiency as a function of pseudo-rapidity 𝜼 of probe standalone muons in the “Tracker-only Seeded Tracks” collection. Data (black dots) and Madgraph DY (violet rectangles). The uncertainties shown are statistical and are frequently smaller than the marker size. Systematic uncertainties are not yet evaluated and can be significant. Due to a larger mass resolution for η > 1.1 and η < - 1.1, a fit mass range extension to [40, 150] GeV has been used allowing more events off the peak for the background component fit.
	The tracking efficiency as a function of number of primary vertices in the “Tracker-only Tracks” collection. Data (black dots) and Madgraph DY (violet rectangles). The uncertainties shown are statistical and are frequently smaller than the marker size. Systematic uncertainties are not yet evaluated and can be significant.
	The tracking efficiency as a function of transverse momentum of standalone muons in the “Tracker-only Tracks” collection. Data (black dots) and Madgraph DY (violet rectangles). The uncertainties shown are statistical and are frequently smaller than the marker size. Systematic uncertainties are not yet evaluated and can be significant.

-- BrunellaDAnzi - 2022-10-17