CERN Accelerating science

CMS Detector Performance Summaries

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2016-01-14
11:22
Tracking and Luminosity Calibration of the PLT /CMS Collaboration
The Pixel Luminosity Telescope (PLT) is one of the newest additions to the CMS detector for the LHC Run II data taking period. On each side of the CMS detector it consists of eight 3-layer telescopes based on silicon pixel detectors that are placed around the beam pipe viewing the interaction point at small angle. [...]
CMS-DP-2016-004; CERN-CMS-DP-2016-004.- Geneva : CERN, 2015 - 5 p. Fulltext: PDF;

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2016-01-14
11:22
Machine Induced Background with BCM1F 2015 /CMS Collaboration
The Fast Beam Condition Monitor BCM1F consists of 24 single-crystal CVD 5 mm x 5 mm diamonds positioned 1.8 m on either side of the interaction point at a radius of 6.5 cm from the beam pipe. The signal is read out, shaped by a frontend ASIC, and converted to an optical signal which is then transmitted to the backend electronics in USC55. [...]
CMS-DP-2016-003; CERN-CMS-DP-2016-003.- Geneva : CERN, 2015 - 10 p. Fulltext: PDF;

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2016-01-14
11:22
The CMS Beam Halo Monitor Detector System /CMS Collaboration
A new Beam Halo Monitor (BHM) detector system has been installed in the CMS cavern to measure the machine-induced background (MIB) from the LHC. This background originates from interactions of the LHC beam halo with the final set of collimators before the CMS experiment and from beam gas interactions. [...]
CMS-DP-2016-002; CERN-CMS-DP-2016-002.- Geneva : CERN, 2015 - 4 p. Fulltext: PDF;

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2016-01-14
11:21
Performance of the CMS Beam Halo Monitor /CMS Collaboration
The CMS Beam Halo Monitor has been successfully installed in the CMS cavern in LHC Long Shutdown 1 for measuring the machine induced background for LHC Run II. The system is based on 40 detector units composed of radiation hard synthetic quartz Cherenkov radiators coupled to fast photomultiplier tubes for a direction sensitive measurement. [...]
CMS-DP-2016-001; CERN-CMS-DP-2016-001.- Geneva : CERN, 2015 - 6 p. Fulltext: PDF;

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2015-12-30
11:40
Electron and Photon performance using data collected by CMS at $\sqrt{s}$ = 13 TeV and 25ns
This note describes preliminary performances of the electron and photon reconstruction with the CMS experiment using data collected at $\sqrt{s} = 13~\mathrm{TeV}$ and with a LHC bunch spacing of 25ns. Electron and photon key discriminating variables and their data to simulation agreement are shown. [...]
CMS-DP-2015-067; CERN-CMS-DP-2015-067.- Geneva : CERN, 2015 - 36 p. Fulltext: PDF;

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2015-12-17
11:21
HIG PAG DPS plots for presentations before Moriond 2016
A few distributions related to Higgs analyses are shown in these slides
CMS-DP-2015-066; CERN-CMS-DP-2015-066.- Geneva : CERN, 2015 - 64 p. Fulltext: PDF;

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2015-12-17
11:21
Validation of 2015 laser corrections with electrons /CMS Collaboration
History plot for 2015 data of the ratio of electron energy E, measured in the ECAL Barrel, to the electron momentum p, measured in the tracker
CMS-DP-2015-065; CERN-CMS-DP-2015-065.- Geneva : CERN, 2015 - 4 p. Fulltext: PDF;

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2015-12-16
15:18
Performance of b-Tagging Algorithms in 25ns Data at 13TeV /CMS Collaboration
At the Large Hadron Collider, the identification of jets originating from b quarks is important for searches for new physics and for measurements of standard model processes. A variety of algorithms has been developed by CMS to select b-quark jets based on variables such as the impact parameters of the charged-particle tracks, the properties of reconstructed decay vertices, and the presence or absence of a lepton, or combinations thereof. [...]
CMS-DP-2015-056; CERN-CMS-DP-2015-056.- Geneva : CERN, 2015 - 21 p. Fulltext: PDF;

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2015-12-16
14:38
First Results of the Pixel Detector Performance in 2015 /CMS Collaboration
The CMS pixel detector consists of 66 million pixels arranged in three cylindric layers in the barrel region and two end-cap disks on each side of the barrel. It is used for seeding in track reconstruction. [...]
CMS-DP-2015-064; CERN-CMS-DP-2015-064.- Geneva : CERN, 2015 - 13 p. Fulltext: PDF;

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2015-12-16
14:37
History of ECAL response with laser data /CMS Collaboration
Update of the crystal transparency evolution in ECAL with laser data including measurements taken up to Oct., 8th 2015
CMS-DP-2015-063; CERN-CMS-DP-2015-063.- Geneva : CERN, 2015 - 4 p. Fulltext: PDF;

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