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Ꮃeb of Science: Recent submissions
Now showing items 921-940 of 1868
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Precision measurement of the structure of the CMS inner tracking system using nuclear interactions
(Iop Publishing Ltd, 2018)The structure of the CMS inner tracking system has been studied using nuclear interactions of hadrons striking its material. Data from proton-proton collisions at a center-of-mass energy of 13 TeV recorded in 2015 at the ... -
Performance of the CMS Level-1 trigger in proton-proton collisions at ?s=13 TeV
(Iop Publishing Ltd, 2020)At the start of Run 2 in 2015, the LHC delivered proton-proton collisions at a center-ofmass energy of 13 TeV. During Run 2 (years 2015-2018) the LHC eventually reached a luminosity of 2.1 x 10(34) cm(-2) s(-1), almost ... -
Performance of the reconstruction and identification of high-momentum muons in proton-proton collisions at ?s=13 TeV
(Iop Publishing Ltd, 2020)The CMS detector at the LHC has recorded events from proton-proton collisions, with muon momenta reaching up to 1.8 TeV in the collected dimuon samples. These high-momentum muons allow direct access to new regimes in physics ... -
The very forward CASTOR calorimeter of the CMS experiment
(Iop Publishing Ltd, 2021)The physics motivation, detector design, triggers, calibration, alignment, simulation, and overall performance of the very forward CASTOR calorimeter of the CMS experiment are reviewed. The CASTOR Cherenkov sampling ... -
Measurements with silicon photomultipliers of dose-rate effects in the radiation damage of plastic scintillator tiles in the CMS hadron endcap calorimeter
(Iop Publishing Ltd, 2020)Measurements are presented of the reduction of signal output due to radiation damage for two types of plastic scintillator tiles used in the hadron endcap (HE) calorimeter of the CMS detector. The tiles were exposed to ... -
Identification of heavy, energetic, hadronically decaying particles using machine-learning techniques
(Iop Publishing Ltd, 2020)Machine-learning (ML) techniques are explored to identify and classify hadronic decays of highly Lorentz-boosted W/Z/Higgs bosons and top quarks. Techniques without ML have also been evaluated and are included for comparison. ... -
Calibration of the CMS hadron calorimeters using proton-proton collision data at ?s=13 TeV
(Iop Publishing Ltd, 2020)Methods are presented for calibrating the hadron calorimeter system of theCMSetector at the LHC. The hadron calorimeters of the CMS experiment are sampling calorimeters of brass and scintillator, and are in the form of one ... -
Pileup mitigation at CMS in 13 TeV data
(Iop Publishing Ltd, 2020)With increasing instantaneous luminosity at the LHC come additional reconstruction challenges. At high luminosity, many collisions occur simultaneously within one proton-proton bunch crossing. The isolation of an interesting ... -
Reconstruction of signal amplitudes in the CMS electromagnetic calorimeter in the presence of overlapping proton-proton interactions
(Iop Publishing Ltd, 2020)A template fitting technique for reconstructing the amplitude of signals produced by the lead tungstate crystals of the CMS electromagnetic calorimeter is described. This novel approach is designed to suppress the contribution ... -
Performance of missing transverse momentum reconstruction in proton-proton collisions at ?s=13 TeV using the CMS detector
(Iop Publishing Ltd, 2019)The performance of missing transverse momentum ((p) over right arrow (miss)(T)) reconstruction algorithms for the CMS experiment is presented, using proton-proton collisions at a center-of-mass energy of 13 TeV, collected ... -
Mechanical stability of the CMS strip tracker measured with a laser alignment system
(Iop Publishing Ltd, 2017)The CMS tracker consists of 206m(2) of silicon strip sensors assembled on carbon fibre composite structures and is designed for operation in the temperature range from -25 to + 25 degrees C. The mechanical stability of ... -
Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at ?s=8 TeV
(Iop Publishing Ltd, 2015)The performance and strategies used in electron reconstruction and selection at CMS are presented based on data corresponding to an integrated luminosity of 19.7 fb(-1), collected in proton-proton collisions at root s = ... -
Performance of the CMS missing transverse momentum reconstruction in pp data at ?s=8 TeV
(Iop Publishing Ltd, 2015)The performance of missing transverse energy reconstruction algorithms is presented using root s = 8 TeV proton-proton (pp) data collected with the CMS detector. Events with anomalous missing transverse energy are studied, ... -
The CMS trigger system
(Iop Publishing Ltd, 2017)This paper describes the CMS trigger system and its performance during Run 1 of the LHC. The trigger system consists of two levels designed to select events of potential physics interest from a GHz (MHz) interaction rate ... -
Performance of photon reconstruction and identification with the CMS detector in proton-proton collisions at ?s=8TeV
(Iop Publishing Ltd, 2015)A description is provided of the performance of the CMS detector for photon reconstruction and identification in proton-proton collisions at a centre-of-mass energy of 8 TeV at the CERN LHC. Details are given on the ... -
Reconstruction and identification of ? lepton decays to hadrons and ?? at CMS
(Iop Publishing Ltd, 2016)This paper describes the algorithms used by the CMS experiment to reconstruct and identify tau -> hadrons + nu(tau) decays during Run 1 of the LHC. The performance of the algorithms is studied in proton-proton collisions ... -
Dose rate effects in the radiation damage of the plastic scintillators of the CMS hadron endcap calorimeter
(Iop Publishing Ltd, 2016)We present measurements of the reduction of light output by plastic scintillators irradiated in the CMS detector during the 8 TeV run of the Large Hadron Collider and show that they indicate a strong dose rate effect. The ... -
Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
(Iop Publishing Ltd, 2017)Improved jet energy scale corrections, based on a data sample corresponding to an integrated luminosity of 19.7 fb(-1) collected by the CMS experiment in proton-proton collisions at a center-of-mass energy of 8 TeV, are ... -
Geant4 simulation of a conceptual calorimeter based on secondary electron emission
(Iop Publishing Ltd, 2017)We present a conceptual sampling electromagnetic calorimeter based on secondary electron emission process. The secondary electron emission process was implemented in Geant4 as a user physics class, which accurately reproduces ... -
Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV
(Iop Publishing Ltd, 2018)Many measurements and searches for physics beyond the standard model at the LHC rely on the efficient identification of heavy-flavour jets, i.e. jets originating from bottom or charm quarks. In this paper, the discriminating ...
