CERN Accelerating science

CMS Detector Performance Summaries

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2017-08-08
11:19
Performance of the Pixel Luminosity Telescope for Luminosity Measurement at CMS during Run 2 /CMS Collaboration
The Pixel Luminosity Telescope (PLT) is a dedicated system for luminosity measurement at the CMS experiment using silicon pixel sensors arranged into "telescopes", each consisting of three planes. It was installed during LS1 at the beginning of 2015 and has been providing online and offline luminosity measurements throughout Run 2. [...]
CMS-DP-2017-030; CERN-CMS-DP-2017-030.- Geneva : CERN, 2017 - 11 p. Fulltext: PDF;

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2017-08-01
16:17
Heavy Flavour distributions from CMS with 2017 data at $\sqrt{s} = 13$ TeV /CMS Collaboration
We report plots on heavy flavour from the first data collected in 2017 by CMS at LHC at $\sqrt{s} = 13$ TeV. Dimuon invariant mass spectra obtained with triggers deployed for heavy flavour analyses, performance plots on quarkonia and b hadrons are included..
CMS-DP-2017-029; CERN-CMS-DP-2017-029.- Geneva : CERN, 2017 - 38 p. Fulltext: PDF;

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2017-07-20
14:31
Missing transverse energy performance in high pileup data collected by CMS in 2016 /CMS Collaboration
In this note we summarize the Missing Transverse Energy (ETmiss) performance using the high pile up proton-proton collisions data at 13 TeV recorded by CMS in 2016. Resolution of ETmiss using two different algorithms, Particle Flow and Puppi, are measured in events with an identified Z boson..
CMS-DP-2017-028; CERN-CMS-DP-2017-028.- Geneva : CERN, 2017 - 8 p. Fulltext: PDF;

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2017-07-20
14:31
New Developments for Jet Substructure Reconstruction in CMS /CMS Collaboration
We present Monte Carlo based studies showcasing several developments for jet substructure reconstruction in CMS. This include Quark/Gluon tagging algorithms using Boosted Decision Trees and Deep Neural Networks, the XCone jet clustering algorithm and the Boosted Event Shape Tagger (BEST)..
CMS-DP-2017-027; CERN-CMS-DP-2017-027.- Geneva : CERN, 2017 - 34 p. Fulltext: PDF;

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2017-07-20
14:30
W and top tagging scale factors /CMS Collaboration
This note presents an improved determination of the efficiency and data/MC scale factors for the identification of hadronically decaying top quarks using the full 2016 CMS dataset. Also shown is an improved measurement of the W boson tagging performance using the full 2016 CMS dataset. [...]
CMS-DP-2017-026; CERN-CMS-DP-2017-026.- Geneva : CERN, 2017 - 25 p. Fulltext: PDF;

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2017-07-05
15:53
Level-1 E/Gamma and Muon performance on 2017 data /CMS Collaboration
After the first long shutdown, the LHC has restarted at a centre-of-mass energy of 13~TeV. In 2016, the LHC achieved an instantaneous luminosity larger than $10^{34}$~$\mathrm{cm}^{-2}\cdot\mathrm{s}^{-1}$ and a peak average pile-up of more than 40. The CMS Level-1 trigger architecture has undergone a full upgrade in order to maintain and improve the trigger performance under these new conditions. [...]
CMS-DP-2017-024; CERN-CMS-DP-2017-024.- Geneva : CERN, 2017 - 29 p. Fulltext: PDF;

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2017-07-05
15:53
CMS ECAL Laser monitoring up to 2017, $\pi^0$/$\eta$ $\rightarrow$ $\gamma\gamma$ spectrum and monitoring, ES calibration /CMS Collaboration
CMS ECAL Laser monitoring up to 2017, $\pi^0$/$\eta$ $\rightarrow$ $\gamma\gamma$ spectrum and monitoring, ES calibration
CMS-DP-2017-023; CERN-CMS-DP-2017-023.- Geneva : CERN, 2017 - 13 p. Fulltext: PDF;

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2017-07-05
15:53
Level 1 Tau trigger performance in 2016 data and VBF seeds at Level 1 trigger /CMS Collaboration
After the first long shutdown, the LHC has restarted at a centre-of-mass energy of 13 TeV. In 2016, the LHC achieved an instantaneous luminosity larger than $10^{34}$ $\mathrm{cm}^{-2}\cdot \mathrm{s}^{-1}$ and a peak average pile-up of more than 40. The CMS Level-1 trigger architecture has undergone a full upgrade in order to maintain and improve the trigger performance under these new conditions. [...]
CMS-DP-2017-022; CERN-CMS-DP-2017-022.- Geneva : CERN, 2017 - 20 p. Fulltext: PDF;

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2017-07-05
15:53
CMS Tracker Alignment Performance Results 2016 /CMS Collaboration
The tracking system of the CMS detector provides excellent resolution for charged particle tracks and an efficient way of tagging jets. In order to reconstruct good quality tracks, the position and orientation of each silicon pixel and strip module needs to be determined with a precision of several micrometers. [...]
CMS-DP-2017-021; CERN-CMS-DP-2017-021.- Geneva : CERN, 2017 - 28 p. Fulltext: PDF;

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2017-05-30
09:11
Study of the CMS Phase 1 Pixel Pilot Blade Reconstruction /CMS Collaboration
The silicon pixel detector is the innermost component of the CMS tracking system. It was replaced in March 2017 with an upgraded one, called the Phase 1 upgrade detector. [...]
CMS-DP-2017-020; CERN-CMS-DP-2017-020.- Geneva : CERN, 2017 - 15 p. Fulltext: PDF;

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