Performance of Dstar reconstruction on first Runs of Run3 at 900 GeV


Results are on the way to be published in a DP note.

Abstract

In this note the performance of D* meson reconstruction on MinimumBias datasets of the first runs of Run 3 at 900 CMS.GeV center-of-mass energy, in 2021 and 2022, is documented.

Link to the public DP note

Results have been published in the detector performance note CMS-DP-2022-024

Results

2021PromptReco_lpt_v4.png 2021PromptReco_hpt_v4.png

ΔM=M(D*)-M^(D0) distributions for D* to D0pi, D0 to Kpi for pT(D*) < 3.5 CMS.GeV (left) and pT(D*) > 3.5 CMS.GeV (right) for the full 2021 900 CMS.GeV pilot run MinimumBias sample, prompt reconstruction, 1 nb-1.

The fitted continous shapes in blue describe the data points (bullets) for both signal (solid) and background (dashed). The normalized wrong charge distribution (red) is a good proxy of the background.

2021ReReco_lpt_v4.png 2021ReReco_hpt_v4.png

Same distributions for the same 2021 pilot data, rereconstruction with better tracking and vertexing code, calibration and alignment. The improvement in mass peak resolution (both lower and higher pT) and signal to background ratio (lower pT) is clearly visible.

2022PromptReco_lpt_v4.png 2022promptReco_hpt_v4.png

Same distributions for the first "good" 2.1 nb-1 of run 2022A, 900 CMS.GeV running, prompt reconstruction. The increased statistics is clearly visible. The prompt reconstruction mass resolution is already similar to (lower pT) or better than (higher pT) the re-reconstruction of the 2021 pilot data.

2021PromptReco_lpt_v5.png 2021PromptReco_hpt_v5.png

Same plots as above for 2021, prompt reconstruction, except for dedicated vertical scale.

2021ReReco_lpt_v5.png 2021ReReco_hpt_v5.png

Same plots as above for 2021, re-reconstruction, except for dedicated vertical scale.

2022PromptReco_lpt_v4.png 2022promptReco_hpt_v5.png

Same plots as above for 2022A, with the "CMS.PromptReco" label removed; for "standalone" presentation.

-- AchimGeiser - 2022-06-17

Topic attachments
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PDFpdf 2021PromptReco_hpt_v4.pdf r1 manage 200.3 K 2022-06-29 - 11:47 AchimGeiser  
PNGpng 2021PromptReco_hpt_v4.png r1 manage 34.3 K 2022-06-29 - 11:47 AchimGeiser  
PDFpdf 2021PromptReco_hpt_v5.pdf r1 manage 192.6 K 2022-06-29 - 11:47 AchimGeiser  
PNGpng 2021PromptReco_hpt_v5.png r1 manage 36.4 K 2022-06-29 - 11:47 AchimGeiser  
PDFpdf 2021PromptReco_lpt_v4.pdf r1 manage 194.1 K 2022-06-29 - 11:48 AchimGeiser  
PNGpng 2021PromptReco_lpt_v4.png r1 manage 37.1 K 2022-06-29 - 11:48 AchimGeiser  
PDFpdf 2021PromptReco_lpt_v5.pdf r1 manage 197.2 K 2022-06-29 - 11:48 AchimGeiser  
PNGpng 2021PromptReco_lpt_v5.png r1 manage 40.2 K 2022-06-29 - 11:48 AchimGeiser  
PDFpdf 2021ReReco_hpt_v4.pdf r1 manage 199.6 K 2022-06-29 - 11:50 AchimGeiser  
PNGpng 2021ReReco_hpt_v4.png r1 manage 34.4 K 2022-06-29 - 11:50 AchimGeiser  
PDFpdf 2021ReReco_hpt_v5.pdf r1 manage 192.0 K 2022-06-29 - 11:50 AchimGeiser  
PNGpng 2021ReReco_hpt_v5.png r1 manage 36.5 K 2022-06-29 - 11:50 AchimGeiser  
PDFpdf 2021ReReco_lpt_v4.pdf r1 manage 190.8 K 2022-06-29 - 11:52 AchimGeiser  
PNGpng 2021ReReco_lpt_v4.png r1 manage 35.4 K 2022-06-29 - 11:52 AchimGeiser  
PDFpdf 2021ReReco_lpt_v5.pdf r1 manage 194.6 K 2022-06-29 - 11:52 AchimGeiser  
PNGpng 2021ReReco_lpt_v5.png r1 manage 37.6 K 2022-06-29 - 11:52 AchimGeiser  
PDFpdf 2022PromptReco_hpt_v4.pdf r1 manage 190.8 K 2022-06-29 - 11:53 AchimGeiser  
PNGpng 2022PromptReco_hpt_v4.png r1 manage 37.3 K 2022-06-29 - 11:53 AchimGeiser  
PDFpdf 2022PromptReco_hpt_v5.pdf r1 manage 190.8 K 2022-06-29 - 11:53 AchimGeiser  
PNGpng 2022PromptReco_hpt_v5.png r1 manage 36.5 K 2022-06-29 - 11:53 AchimGeiser  
PDFpdf 2022PromptReco_lpt_v4.pdf r1 manage 197.4 K 2022-06-29 - 11:54 AchimGeiser  
PNGpng 2022PromptReco_lpt_v4.png r1 manage 39.8 K 2022-06-29 - 11:54 AchimGeiser  
PDFpdf 2022PromptReco_lpt_v5.pdf r1 manage 197.4 K 2022-06-29 - 11:54 AchimGeiser  
PNGpng 2022PromptReco_lpt_v5.png r1 manage 39.0 K 2022-06-29 - 11:54 AchimGeiser  
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