CERN Accelerating science

CMS Detector Performance Summaries

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A proposed DT-seeded Muon Track Trigger for the HL-LHC /CMS Collaboration
The LHC program after the observation of the candidate SM Higgs boson will continue with collisions at 13 and 14 TeV, which will help clarify future subjects of study and shape the tools needed to carry them on. Any upgrade of the LHC experiments for unprecedented luminosities, such as the HL-LHC ones, must then maintain the acceptance on electroweak processes that can lead to a detailed study of the properties of the candidate Higgs boson. [...]
CMS-DP-2015-008; CERN-CMS-DP-2015-008.- Geneva : CERN, 2015 - 22 p. Fulltext: PDF;

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L1 calorimeter trigger upgrade: electron and photon performance /CMS Collaboration
After the first long shutdown the LHC will restart in 2015, and instantaneous luminosity greater than $10^{34}$ cm$^{-2}$ s$^{-1}$ and an average number of pile-up events of 45 or higher could be achieved. To avoid a significant increase in energy thresholds, which would be detrimental for physics, an upgrade of the L1 trigger system is required for Run 2. [...]
CMS-DP-2015-003; CERN-CMS-DP-2015-003.- Geneva : CERN, 2015 - 16 p. Fulltext: PDF;

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Double Muon Trigger efficiency in 2012 data /CMS Collaboration
Method and results for the computation of the efficiency of double muon triggers are presented in this report. Efficiencies for the two main HLT double muon triggers used in 2012 ($Mu17\_Mu8$ and $Mu17\_TkMu8$) are computed on the basis of data collected at the end of the LHC Run-1 period (Run2012D dataset). Moreover, a breakdown of the intermediate results from each step of the efficiency measurement method, as well as data/montecarlo scale-factor ratios, are presented for the $Mu17\_TkMu8$ trigger..
CMS-DP-2014-038; CERN-CMS-DP-2014-038.- Geneva : CERN, 2014 - 10 p. Fulltext: PDF;

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Jet measurement with the CASTOR calorimeter /CMS Collaboration
The measurement of low $p_T$ ($> 3$ GeV) very forward ($\sim 6$) jets with the CASTOR calorimeter of the CMS experiment is presented. The CASTOR (Centauro And STrange Objects Research) calorimeter is covering the pseudorapidity range $-6.6 < \eta < -5.2$ and is located at -14.37 m from the interaction point. [...]
CMS-DP-2014-022; CERN-CMS-DP-2014-022.- Geneva : CERN, 2014 - 13 p. Fulltext: PDF;

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In-situ measurements of the CMS tracker material /CMS Collaboration
In-situ measurements of the CMS tracker material
CMS-DP-2014-027; CERN-CMS-DP-2014-027.- Geneva : CERN, 2014 - 2 p. Fulltext: PDF;

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FLUKA particle flux maps at the CMS detector for muon detectors /CMS Collaboration
FLUKA particle flux maps for the CMS Detector using FLUKA geometry version, which corresponds to the detector configuration prior to LS1, without the CASTOR detector. The area of the muon detectors is shown in particular..
CMS-DP-2014-025; CERN-CMS-DP-2014-025.- Geneva : CERN, 2014 - 19 p. Fulltext: PDF;

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L1-tau trigger for LHC phase-1 - performance plots /CMS Collaboration
A new algorithm dedicated to the tau lepton trigger at Level-1 has been developed for the phase-1 of the LHC. A thorough study of the tau energy deposits in the CMS calorimeters performed directly on data taken during the LHC Run 1 has guided the development of this new algorithm. [...]
CMS-DP-2014-024; CERN-CMS-DP-2014-024.- Geneva : CERN, 2014 - 38 p. Fulltext: PDF;

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Performance of the Mean-Timer algorithm for DT Local Reconstruction and muon time measurement. /CMS Collaboration
The Mean-Timer algorithm has been recently implemented as default for the local reconstruction within the CMS Drift Tubes (DT), for muons that appear to be out-of-time (OOT) or lack measured hits on one of the two space projections. Besides improving the spatial resoluton for OOT muons, this method allows a precise time measurement that can be used to tag OOT muons, in order either to reject them (e.g. [...]
CMS-DP-2014-021; CERN-CMS-DP-2014-021.- Geneva : CERN, 2014 - 9 p. Fulltext: PDF;

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Muon ID performance: low-$p_{T}$ muon efficiencies /CMS Collaboration
Muon Identification efficiencies from 2012 Data, obtained from $J/\Psi \rightarrow \mu\mu$ decays by the Tag and Probe method. They cover the range of muon $p_{T}<20$ GeV..
CMS-DP-2014-020; CERN-CMS-DP-2014-020.- Geneva : CERN, 2014 - 12 p. Fulltext: PDF;

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Muon Identification performance: hadron mis-Id measurements and RPC Muon selections /CMS Collaboration
Pion, kaon, proton mis-identification probabilities as muons have been measured for different Muon ID algorithms. Results from two independent analyses are presented. [...]
CMS-DP-2014-018; CERN-CMS-DP-2014-018.- Geneva : CERN, 2014 - 34 p. Fulltext: PDF;

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