CERN Accelerating science

CMS Detector Performance Summaries

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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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CMS Tracker Alignment Validation with Electron Tracks /CMS Collaboration
Selected CMS tracker alignment performance plots, obtained using combined tracking and calorimetric information, are shown, including measurements of the residual twist and curl weak mode amplitudes in the 8 TeV CMS data..
CMS-DP-2014-019; CERN-CMS-DP-2014-019.- Geneva : CERN, 2014 - 17 p. Fulltext: PDF;

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ECAL Timing Performance /CMS Collaboration
The CMS electromagnetic calorimeter (ECAL) is made of about 75000 scintillating lead tungstate crystals arranged in a barrel and two endcaps. The scintillation light is read out by avalanche photodiodes in the barrel and vacuum phototriodes in the endcaps, at which point the scintillation pulse is amplified and sampled at 40 MHz by the on-detector electronics. [...]
CMS-DP-2014-011; CERN-CMS-DP-2014-011.- Geneva : CERN, 2014 - 14 p. Fulltext: PDF;

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Tau ID Performance Plots
Tau ID efficiency and jet $\to$ tau fake-rates measured in the 2012 data are compared to the Monte Carlo simulation, for different tau ID discriminators..
CMS-DP-2014-015; CERN-CMS-DP-2014-015.- Geneva : CERN, 2014 - 8 p. Fulltext: PDF;

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Centrality measurement in pPb collisions
To measure the centrality dependence of any observable in pPb, the binary scaling factors (Ncoll) between pp and pPb have to be determined for each centrality class. The centrality biases for each analysis has to be studied and corrected. [...]
CMS-DP-2014-009; CERN-CMS-DP-2014-009.- Geneva : CERN, 2014 - 23 p. Fulltext: PDF;

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Absolute jet energy scale calibration using semi-leptonic muon channel in $t \bar t$ events at 8 TeV /CMS Collaboration
This note includes plots indicating the current state of the absolute jet energy scale calibration in CMS experiment at $\sqrt s = 8$~TeV using the $W$ mass constraintin $t \bar t$ events with $W\to q \bar q$ decay. The data sample from 2012 with an integrated luminosity of 18.8 fb$^{-1}$ is used..
CMS-DP-2014-010; CERN-CMS-DP-2014-010.- Geneva : CERN, 2013 - 14 p. Fulltext: PDF;

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