CMS Tracking POG Performance Plots 2016 (targeting ICHEP conference)

Track Reconstruction Performance

Vertex Finding

Plot	Description
pdf png	Comparison of the primary vertex resolution in x vs pT sum of the associated tracks for 2015 (blue triangles) and 2016 (red rectangles). The degradation of the resolutions by 10 % is caused mainly by larger pixel dynamic inefficiency due to higher instantaneous luminosity in 2016, leading to larger fraction of tracks with hit missing from the innermost pixel barrel layer. In 2016 data the transverse resolution is better than 14 μm, and the longitudinal resolution is better than 19 μm for primary vertices with sum of track pT > 100 GeV.
pdf png	Comparison of the primary vertex resolution in z vs pT sum of the associated tracks for 2015 (blue triangles) and 2016 (red rectangles). The degradation of the resolutions by 10 % is caused mainly by larger pixel dynamic inefficiency due to higher instantaneous luminosity in 2016, leading to larger fraction of tracks with hit missing from the innermost pixel barrel layer. In 2016 data the transverse resolution is better than 14 μm, and the longitudinal resolution is better than 19 μm for primary vertices with sum of track pT > 100 GeV.
pdf png	Comparison of the primary vertex resolution in x vs the number of reconstructed vertices for 2015 (blue triangles) and 2016 (red rectangles). The degradation of the resolutions by 10 % is caused mainly by larger pixel dynamic inefficiency due to higher instantaneous luminosity in 2016, leading to larger fraction of tracks with hit missing from the innermost pixel barrel layer.
pdf png	Comparison of the primary vertex resolution in z vs the number of reconstructed vertices for 2015 (blue triangles) and 2016 (red rectangles). The degradation of the resolutions by 10 % is caused mainly by larger pixel dynamic inefficiency due to higher instantaneous luminosity in 2016, leading to larger fraction of tracks with hit missing from the innermost pixel barrel layer.

V0 Reconstruction

Plot	Description
pdf gif	Kshort invariant mass reconstructed from oppositely-charged pion candidates in data. The fit is performed using a double-gaussian with a common mean for the signal plus a linear polynomial for the background.
pdf gif	Lambda invariant mass reconstructed from oppositely-charged pion/proton candidates in data. The fit is performed using a double-gaussian with a common mean for the signal plus a quadratic polynomial for the background.
pdf gif	Kshort invariant mass reconstructed from oppositely-charged pion candidates in simulation. The fit is performed using a double-gaussian with a common mean for the signal plus a linear polynomial for the background.
pdf gif	Lambda invariant mass reconstructed from oppositely-charged pion/proton candidates in simulation. The fit is performed using a double-gaussian with a common mean for the signal plus a quadratic polynomial for the background.
pdf gif	Kshort invariant mass as a function of eta for data (blue points) and simulation (red points). The shape is well described by simulation. The 0.5 MeV shift is attributed to imprecise modeling of detector material.
pdf gif	Lambda invariant mass as a function of eta for data (blue) and simulation (red). The shape is well described by simulation. Note: The pion mass is used in the trajectory fit to account for material effects.
pdf gif	Kshort invariant mass as a function of pT, phi, and the decay length for data (blue points) and simulation (red points) inside the central (top row) and forward (bottom row) regions. The decay length is the 3d distance from the Kshort vertex to the nearest primary vertex. The shape is well described by simulation. The 0.5 MeV shift is attributed to imprecise modeling of detector material. The pion momentum determination is uniform inside a 0.2% scale in the whole tracker volume.
pdf gif	Lambda invariant mass as a function of pT, phi, and the decay length for data (blue points) and simulation (red points) inside the central (top row) and forward (bottom row) regions. The decay length is the 3d distance from the Lambda vertex to the nearest primary vertex. The shape is well described by simulation. Note: The pion mass is used in the trajectory fit to account for material effects.

Muon Tag & Probe

Plot	Description
	Data (black dots) and simulation (light blue rectangles) tracking efficiency for muons coming from the Z decay as a function of the absolute pseudorapidity(left) and the pseudorapidity(right) of the probe muon.
	Data (black dots) and simulation (light blue rectangles) tracking efficiency for muons coming from the Z decay as a function of the phi(left) and number of primary vertexes(right) of the probe muon.
	Data (black dots) and simulation (purple rectangles) tracking efficiency for muons coming from the Z decay as a function of the absolute pseudorapidity(left) and the pseudorapidity(right) of the probe muon for tracks in the Tracker-only seeded collection.
	Data (black dots) and simulation (light blue rectangles) tracking efficiency for muons coming from the Z decay as a function of the phi(left) and number of primary vertexes(right) of the probe muon for tracks in the Tracker-only seeded collection.

Pion relative efficiency

Beam Spot Reconstruction

Plot	Description
pdf png	X position of the luminous region in CMS interaction point, with respect to the CMS reference frame centred on the mechanical support of the Tracker. The luminous region quantities are determined through a fit to the three-dimensional distribution of the primary vertices and through a fit to the track impact parameter vs track φ distribution. These fits are performed for each luminosity section. Subsequently, the results are averaged over contiguous luminosity sections (Interval of Validity). An interval of validity is closed and a new one is opened if the boundary of 60 luminosity sections is reached or if any quantity drifts significantly. The resulting values for each IoV are shown in figure as a function of time using the single luminosity section (duration 23s) as unit. The data considered in this plot have been collected by CMS in 2016 during proton collisions at 13 TeV. Only DCS-certified runs from 272760 to 275376 are included.
pdf png	X transverse dimension of the luminous region in CMS interaction point, with respect to the CMS reference frame centred on the mechanical support of the Tracker. The luminous region quantities are determined through a fit to the three-dimensional distribution of the primary vertices and through a fit to the track impact parameter vs track φ distribution. These fits are performed for each luminosity section. Subsequently, the results are averaged over contiguous luminosity sections (Interval of Validity). An interval of validity is closed and a new one is opened if the boundary of 60 luminosity sections is reached or if any quantity drifts significantly. The resulting values for each IoV are shown in figure as a function of time using the single luminosity section (duration 23s) as unit. The data considered in this plot have been collected by CMS in 2016 during proton collisions at 13 TeV. Only DCS-certified runs from 272760 to 275376 are included.
pdf png	Y transverse dimension of the luminous region in CMS interaction point, with respect to the CMS reference frame centred on the mechanical support of the Tracker. The luminous region quantities are determined through a fit to the three-dimensional distribution of the primary vertices and through a fit to the track impact parameter vs track φ distribution. These fits are performed for each luminosity section. Subsequently, the results are averaged over contiguous luminosity sections (Interval of Validity). An interval of validity is closed and a new one is opened if the boundary of 60 luminosity sections is reached or if any quantity drifts significantly. The resulting values for each IoV are shown in figure as a function of time using the single luminosity section (duration 23s) as unit. The data considered in this plot have been collected by CMS in 2016 during proton collisions at 13 TeV. Only DCS-certified runs from 272760 to 275376 are included.
pdf png	Y transverse dimension of the luminous region in CMS interaction point, with respect to the CMS reference frame centred on the mechanical support of the Tracker. The luminous region quantities are determined through a fit to the three-dimensional distribution of the primary vertices and through a fit to the track impact parameter vs track φ distribution. These fits are performed for each luminosity section. Subsequently, the results are averaged over contiguous luminosity sections (Interval of Validity). An interval of validity is closed and a new one is opened if the boundary of 60 luminosity sections is reached or if any quantity drifts significantly. The resulting values for each IoV are shown in figure as a function of time using the single luminosity section (duration 23s) as unit. The data considered in this plot have been collected by CMS in 2016 during proton collisions at 13 TeV. Only DCS-certified runs from 272760 to 275376 are included.
pdf png	Z position of the luminous region in CMS interaction point, with respect to the CMS reference frame centred on the mechanical support of the Tracker. The luminous region quantities are determined through a fit to the three-dimensional distribution of the primary vertices and through a fit to the track impact parameter vs track φ distribution. These fits are performed for each luminosity section. Subsequently, the results are averaged over contiguous luminosity sections (Interval of Validity). An interval of validity is closed and a new one is opened if the boundary of 60 luminosity sections is reached or if any quantity drifts significantly. The resulting values for each IoV are shown in figure as a function of time using the single luminosity section (duration 23s) as unit. The data considered in this plot have been collected by CMS in 2016 during proton collisions at 13 TeV. Only DCS-certified runs from 272760 to 275376 are included.
pdf png	Z longitudinal dimension of the luminous region in CMS interaction point, with respect to the CMS reference frame centred on the mechanical support of the Tracker. The luminous region quantities are determined through a fit to the three-dimensional distribution of the primary vertices and through a fit to the track impact parameter vs track φ distribution. These fits are performed for each luminosity section. Subsequently, the results are averaged over contiguous luminosity sections (Interval of Validity). An interval of validity is closed and a new one is opened if the boundary of 60 luminosity sections is reached or if any quantity drifts significantly. The resulting values for each IoV are shown in figure as a function of time using the single luminosity section (duration 23s) as unit. The data considered in this plot have been collected by CMS in 2016 during proton collisions at 13 TeV. Only DCS-certified runs from 272760 to 275376 are included.