CERN Accelerating science

CMS Conference Reports

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2018-01-11
14:38
Review of the latest measurements of the inclusive $\mathrm{t\bar t}$ production cross section in CMS / Gonzalez Fernandez, Juan Rodrigo (Oviedo U.) /CMS Collaboration
The measurement of the $\mathrm{t\bar t}$ inclusive production cross section $\sigma_{t\bar t }$ is crucial to probe QCD predictions, constrain new physic scenarios, proton PDFs, top quark pole mass, $\alpha_S$ and many other parameters from the SM. The CMS Collaboration has measured this quantity in different final states and at different centre-of-mass energies, probing QCD calculations and deriving several constraints. [...]
CMS-CR-2018-007.- Geneva : CERN, 2018 - 8 p. Fulltext: PDF;
In : 10th International Workshop on Top Quark Physics, Braga, Portugal, 17 - 22 Sep 2017

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2018-01-11
14:38
Measurement of the $\mathrm{t\bar t}$ inclusive production cross section at 5.02 TeV / Gonzalez Fernandez, Juan Rodrigo (Oviedo U.) /CMS Collaboration
The top quark pair production $\sigma_{t\bar t}$ is measured in pp collisions at a center-of-mass energy of 5.02 TeV. The analyzed data have been collected by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 27.4 /pb. [...]
CMS-CR-2018-005.- Geneva : CERN, 2018 - 6 p. Fulltext: PDF;
In : 10th International Workshop on Top Quark Physics, Braga, Portugal, 17 - 22 Sep 2017

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2018-01-11
14:34
Electronics and triggering challenges for the CMS High Granularity Calorimeter / Lobanov, Artur (Ecole Polytechnique) /CMS Collaboration
The High Granularity Calorimeter (HGCAL), presently being designed by the CMS collaboration to replace the CMS endcap calorimeters for the High Luminosity phase of LHC, will feature six million channels distributed over 52 longitudinal layers. The requirements for the front-end electronics are extremely challenging, including high dynamic range (0-10 pC), low noise (~2000e- to be able to calibrate on single minimum ionising particles throughout the detector lifetime) and low power consumption (~10mW/channel), as well as the need to select and transmit trigger information with a high granularity. [...]
CMS-CR-2017-452.- Geneva : CERN, 2017 - 9 p. Fulltext: PDF;
In : Calorimetry for High Energy Frontier, Lyon, France, 2 - 6 Oct 2017

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2018-01-11
14:34
The front-end data conversion and readout electronics for the CMS ECAL upgrade / Mazza, Gianni (INFN, Turin) /CMS Collaboration
The High Luminosity LHC (HL-LHC) will require a significant upgrade of the readout electronics for the CMS Electromagnetic Calorimeter (ECAL). The Very Front-End (VFE) output signal will be sampled at 160 MS/s (i.e. [...]
CMS-CR-2017-443.- Geneva : CERN, 2017 - 8 p. Fulltext: PDF;
In : Calorimetry for High Energy Frontier, Lyon, France, 2 - 6 Oct 2017

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2018-01-11
14:33
The CMS High Granularity Calorimeter for HL-LHC / Mastrolorenzo, Luca (Aachen, Tech. Hochsch.) /CMS Collaboration
The High Luminosity LHC (HL-LHC) will integrate 10 times more luminosity than the LHC, posing significant challenges for radiation tolerance and event pileup on detectors, especially for forward calorimetry, and hallmarks the issue for future colliders. As part of its HL-LHC upgrade program, the CMS collaboration is designing a High Granularity Calorimeter to replace the existing endcap calorimeters. [...]
CMS-CR-2017-440.- Geneva : CERN, 2017 - 7 p. Fulltext: PDF;
In : The 21st Particles & Nuclei International Conference, Beijing, China, 1 - 5 Sep 2017

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2018-01-11
14:33
Prospects for a precision timing upgrade of the CMS PbWO crystal electromagnetic calorimeter for the HL-LHC / Massironi, Andrea (Northeastern U.) /CMS Collaboration
The upgrade of the Compact Muon Solenoid (CMS) crystal electromagnetic calorimeter (ECAL), which will operate at the High Luminosity Large Hadron Collider (HL-LHC), will achieve a timing resolution of around 30 ps for high energy photons and electrons. In this talk we will discuss the benefits of precision timing for the ECAL event reconstruction at HL-LHC. [...]
CMS-CR-2017-430.- Geneva : CERN, 2017 - 7 p. Fulltext: PDF;
In : Calorimetry for High Energy Frontier, Lyon, France, 2 - 6 Oct 2017

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2018-01-11
14:32
A modern and versatile data-acquisition package for calorimeter prototypes test-beams H4DAQ / Marini, Andrea Carlo (MIT) /CMS Collaboration
The upgrade of the calorimeters for the HL-LHC or for future colliders requires an extensive programme of tests to qualify different detector prototypes with dedicated test beams. A common data-acquisition system (called H4DAQ) was developed for the H4 test beam line at the North Area of the CERN SPS in 2014 and it has since been adopted by an increasing number of teams involved in the CMS experiment and AIDA groups. [...]
CMS-CR-2017-420.- Geneva : CERN, 2017 - 7 p. Fulltext: PDF;
In : Calorimetry for High Energy Frontier, Lyon, France, 2 - 6 Oct 2017

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2018-01-11
14:29
Predicting the performance of the CMS precision PbWO$_4$ electromagnetic calorimeter in the HL-LHC era from test beam results on irradiated crystals / Zghiche, Amina (Ecole Polytechnique) /CMS Collaboration
The harsh radiation environment in which detectors will have to operate during the High Luminosity phase of the LHC (HL-LHC) represents a crucial challenge for many calorimeter technologies. In the CMS forward calorimeters, ionizing doses and hadron fluences will reach up to 300 kGy (at a dose rate of 30 Gy/h) and ${\bf 2\times 10^{14} cm^{-2}}$, respectively, at the pseudorapidity region of {\bf $\vert\eta\vert$}= 2.6. [...]
CMS-CR-2017-350.- Geneva : CERN, 2017 - 6 p. Fulltext: PDF;
In : 14th International Conference on Inorganic Scintillators and their Applications, Chamonix, France, 18 - 22 Sep 2017

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2017-12-19
14:15
The CMS Level-1 Trigger system for LHC Run II / Tapper, Alexander (Imperial Coll., London) /CMS Collaboration
During LHC Run II the centre-of-mass energy of pp collisions has increased up to 13 TeV and the instantaneous luminosity has progressed towards $2 \times 10^{34} \rm{cm}^{-2}\rm{s}^{-1}$. In order to guarantee a successful and ambitious physics programme under these conditions, the CMS trigger system has been upgraded. [...]
CMS-CR-2017-454.- Geneva : CERN, 2017 - 8 p. Fulltext: PDF;
In : Calorimetry for High Energy Frontier, Lyon, France, 2 - 6 Oct 2017

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2017-12-19
14:15
Construction and beam-tests of silicon-tungsten prototype modules for the CMS High Granularity Calorimeter for HL-LHC / Quast, Thorben (Aachen, Tech. Hochsch.) /CMS Collaboration
As part of its HL-LHC upgrade program, CMS is developing a High Granularity Calorimeter (HGCAL) to replace the existing endcap calorimeters. The HGCAL will be realised as a sampling calorimeter, including an electromagnetic compartment comprising 28 layers of silicon pad detectors with pad areas of 0.5 - 1.0 cm$^2$ interspersed with absorbers.Prototype modules, based on 6-inch hexagonal silicon pad sensors with 128 channels, have been constructed and include many of the features required for this challenging detector. [...]
CMS-CR-2017-451.- Geneva : CERN, 2017 - 8 p. Fulltext: PDF;
In : Calorimetry for High Energy Frontier, Lyon, France, 2 - 6 Oct 2017

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