CERN Accelerating science

CMS Detector Performance Summaries

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2024-02-07
13:00
Single and Double Electron Trigger Efficiencies using the full Run 2 dataset /CMS Collaboration
This note describes electron trigger performance (L1+HLT) with the full Run 2 data sample, corresponding to an integrated luminosity of 136.1 fb$^{-1}$..
CMS-DP-2020-016; CERN-CMS-DP-2020-016.- Geneva : CERN, 2020 - 45 p. Fulltext: PDF;

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2024-02-07
13:00
Data reconstruction and simulation modeling of the Bremsstrahlung-induced electron momentum loss in Z to ee events collected at the CMS experiment at 13.6 TeV in 2022 /CMS Collaboration
This note presents the modelling of Bremsstrahlung-induced electron momentum loss for electrons in Z to ee candidate events in data collected in proton-proton collisions at \sqrt{s} = 13.6 TeV and is compared to the modelling of the same in simulation. Good agreement is seen for electrons in both barrel and endcap regions of the detector..
CMS-DP-2024-006; CERN-CMS-DP-2024-006.- Geneva : CERN, 2023 - 5 p. Fulltext: PDF;

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2024-02-05
10:57
Performance of Muon Reconstruction in the CMS High Level Trigger using pp Collision data at $\sqrt{s}$ = 13.6 TeV in 2023 /CMS Collaboration
This note presents muon-trigger efficiencies measured with the data collected in 2023 corresponding to an integrated luminosity of 27 fb$^{-1}$, and the performance is compared with the data collected in 2022 corresponding to an integrated luminosity of 35 fb$^{-1}$..
CMS-DP-2024-005; CERN-CMS-DP-2024-005.- Geneva : CERN, 2024 - 17 p. Fulltext: PDF;

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2024-01-24
18:03
XY-factorization correction for luminosity calibration using off-axis scans for 2022 pp data at 13.6 TeV /CMS Collaboration
This note describes the results of the XY-factorization analysis of the CMS 2022 proton-proton luminosity calibration at 13.6 TeV center-of-mass energy using on-axis Van-der-Meer and off-axis diagonal or offset scans..
CMS-DP-2024-004; CERN-CMS-DP-2024-004.- Geneva : CERN, 2023 - 22 p. Fulltext: PDF;

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2024-01-24
18:03
DeepCore 2.0: Convolutional Neural Network for Tracking in Jets with High Transverse Momentum /CMS Collaboration
Tracking of charged particles in dense environments, especially in the core of high transverse-momentum ($p_T$) jets, presents a growing challenge with increasing LHC luminosity. Despite the CMS phase-1 pixel detector upgrade, and dedicated cluster splitting and pattern recognition algorithms like JetCore, there is still significant room for improvement [...]
CMS-DP-2024-003; CERN-CMS-DP-2024-003.- Geneva : CERN, 2024 - 22 p. Fulltext: PDF;

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2024-01-22
11:45
L1 Trigger and ZDC Performance during 2023 Heavy Ion Run /CMS Collaboration
Ultraperipheral collisions (UPCs) of heavy ions are a useful probe to study nuclear parton distribution functions (nPDFs) and, in particular, to characterize nuclear matter at Bjorken $x < 10^{-3}$ and low squared momentum transfer $Q^2$ (shadowing/saturation regime). In order to fully exploit these collisions, dedicated triggers on such event topologies were developed for the PbPb data-taking period in 2023 by the CMS experiment. [...]
CMS-DP-2024-002; CERN-CMS-DP-2024-002.- Geneva : CERN, 2023 - 23 p. Fulltext: PDF;

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2024-01-15
12:10
Impact of Time-to-Digital converter thresholds on the precision of HGCAL timing
This note documents a series of simulation studies performed to investigate how precision timing measurement by the high granularity calorimeter (HGCAL) of the Compact Muon Solenoid (CMS) Phase-2 detector may be affected by the time-of-arrival (ToA) time-to-digital converter (TDC) threshold. Particle-level simulations are used to parameterize the expected efficiency and ToA resolution of different TDC thresholds. The parameterizations are then applied at stable particle-level of vector-boson-fusion (VBF) production of a Higgs boson to two photons to illustrate the potential gain of the precision timing on noise and pileup reduction in the HGCAL. [...]
CMS-DP-2024-001; CERN-CMS-DP-2024-001.- Geneva : CERN, 2024 - 17 p. Fulltext: PDF;

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2023-12-22
14:45
Performance of high-level triggers using jet substructure on 2023 data /CMS Collaboration
The performance of high-level triggers (HLT) designed to select jets produced by the hadronic decay of massive particles with large boost (e.g., X$\rightarrow$HH$\rightarrow$4b) is studied using a data sample with an integrated luminosity of 27.21 $\text{fb}^{-1}$ collected by the CMS experiment with a (single) muon trigger in 2023..
CMS-DP-2023-094; CERN-CMS-DP-2023-094.- Geneva : CERN, 2023 - 9 p. Fulltext: PDF;

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2023-12-22
14:45
Barrel Timing Layer Performance Plots /CMS Collaboration
The note contains approved figures of performance of the Barrel Timing Detector..
CMS-DP-2023-093; CERN-CMS-DP-2023-093.- Geneva : CERN, 2023 - 14 p. Fulltext: PDF;

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2023-12-11
16:21
Comparison of test beam data with simulation using the HGCAL clustering algorithms CLUE and CLUE3D /CMS Collaboration
Positron data taken in a test beam is compared with simulation, using the HGCAL clustering algorithms CLUE (Clustering of energy) and CLUE3D. Longitudinal and transverse profiles of electromagnetic showers are studied, and the energy resolution before and after clustering is compared. [...]
CMS-DP-2023-092; CERN-CMS-DP-2023-092.- Geneva : CERN, 2023 - 17 p. Fulltext: PDF;

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