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CMS Conference Reports

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2017-12-15
15:35
The CMS Outer Tracker Upgrade for the High Luminosity LHC / Luetic, Jelena (Brussels U.) /CMS Collaboration
The era of the High Luminosity Large Hadron Collider will pose unprecedented challenges for detector design and operation. The planned luminosity of the upgraded machine is $5$x$10^{34} $ cm$^{-2}$s$^{-1}$, reaching an integrated luminosity of more than 3000 fb$^{-1}$ by the end of 2037. [...]
CMS-CR-2017-438.- Geneva : CERN, 2017 - 11 p. Fulltext: PDF;
In : The 26th International Workshop on Vertex Detectors , Las Caldas, Spain, 10 - 15 Sep 2017

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2017-12-15
15:35
The CMS Pixel Detector Upgrade and R\&D for the High Luminosity LHC / Viliani, Lorenzo (INFN, Florence) /CMS Collaboration
The High Luminosity Large Hadron Collider (HL-LHC) at CERN is expected to collide protons at a centre-of-mass energy of 14\,TeV and to reach an unprecedented peak instantaneous luminosity of $5 \times 10^{34}\,{\rm cm}^{-2} {\rm s}^{-1}$ with an average number of pileup events of 140. This will allow the ATLAS and CMS experiments to collect integrated luminosities of up to $3000\,{\rm fb}^{-1}$ during the project lifetime. [...]
CMS-CR-2017-433.- Geneva : CERN, 2017 - 11 p. Fulltext: PDF;
In : The 26th International Workshop on Vertex Detectors , Las Caldas, Spain, 10 - 15 Sep 2017

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2017-12-15
15:35
Commissioning and first results from the CMS phase-1 upgrade pixel detector / Sonneveld, Jorine Mirjam (Hamburg U.) /CMS Collaboration
The phase~1 upgrade of the CMS pixel detector has been designed to maintain the tracking performance at instantaneous luminosities of $2 \times 10^{34} \mathrm{~cm}^{-2} \mathrm{~s}^{-1}$. Both barrel and endcap disk systems now feature one extra layer (4 barrel layers and 3 endcap disks), and a digital readout that provides a large enough bandwidth to read out its 124M pixel channels (87.7 percent more pixels compared to the previous system). The backend control and readout systems have been upgraded accordingly from VME-based to micro-TCA-based ones. The detector is now also fitted with a bi-phase CO$_2$ cooling system that reduces the material budget in the tracking region. The detector has been installed inside CMS at the start of 2017 and is now taking data. These proceedings discuss experiences in the commissioning and operation of the CMS phase~1 pixel detector. The first results from the CMS phase~1 pixel detector with this year's LHC proton-proton collision data are presented. The new pixel detector outperforms the previous one in terms of hit resolution, tracking, and vertex resolution..
CMS-CR-2017-425.- Geneva : CERN, 2017 - 11 p. Fulltext: PDF;
In : The 26th International Workshop on Vertex Detectors , Las Caldas, Spain, 10 - 15 Sep 2017

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2017-12-15
15:35
Calibration of the CMS Hadron Calorimeter in Run 2 / Chadeeva, Marina (Moscow Phys. Eng. Inst.) ; Lychkovskaya, Natalia (Moscow, ITEP) /CMS Collaboration
Various calibration techniques for the CMS Hadron calorimeter in Run2 and the results of calibration using 2016 collision data are presented. The radiation damage corrections, intercalibration of different channels using the phi-symmetry technique for barrel, endcap and forward calorimeter regions are described, as well as the intercalibration with muons of the outer hadron calorimeter. [...]
CMS-CR-2017-449.- Geneva : CERN, 2017 - 8 p. Fulltext: PDF;
In : Calorimetry for High Energy Frontier, Lyon, France, 2 - 6 Oct 2017

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2017-12-15
15:35
The CMS High Granularity Calorimeter for the High Luminosity LHC / Sauvan, Jean-baptiste (Ecole Polytechnique) /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-2017-448.- Geneva : CERN, 2017 - 7 p. Fulltext: PDF;
In : Calorimetry for High Energy Frontier, Lyon, France, 2 - 6 Oct 2017

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2017-12-15
15:35
Commissioning of the CMS Hadron Forward Calorimeters Phase I Upgrade / Bilki, Burak (Iowa U.) ; Onel, Yasar (Iowa U.) /CMS Collaboration
The final phase of the CMS Hadron Forward Calorimeters Phase I upgrade was performed during the Extended Year End Technical Stop of 2016 and 2017. In the framework of the upgrade, the PMT boxes were reworked to implement two channel readout in order to exploit the benefits of the multi-anode PMTs in background tagging and signal recovery. [...]
CMS-CR-2017-446.- Geneva : CERN, 2017 - 8 p. Fulltext: PDF;
In : Calorimetry for High Energy Frontier, Lyon, France, 2 - 6 Oct 2017

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2017-12-15
15:25
The CT-PPS project detector hardware and operational experience / Ravera, Fabio (INFN, Genoa ; U. Genoa) /CMS and TOTEM Collaborations
The CMS-TOTEM Precision Proton Spectrometer allows extending the LHC physics program by measuring protons in the very forward regions of CMS. Tracking and timing detectors have been installed along the beam pipe at $\sim 210$~m from the CMS interaction point on both sides of the LHC tunnel. [...]
CMS-CR-2017-432.- Geneva : CERN, 2017 - 10 p. Fulltext: PDF;
In : The 26th International Workshop on Vertex Detectors , Las Caldas, Spain, 10 - 15 Sep 2017

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2017-12-15
15:25
Large-Area Silicon Detectors for the CMS High Granularity Calorimeter / Pree, Elias (Vienna, OAW) /CMS Collaboration
During the so-called Phase-2 Upgrade, the CMS experiment at CERN will undergo significant improvements to cope with the 10-fold luminosity increase of the High Luminosity LHC (HL-LHC) era. Especially the forward calorimetry will suffer from very high radiation levels and intensified pileup in the detectors. [...]
CMS-CR-2017-431.- Geneva : CERN, 2017 - 9 p. Fulltext: PDF;
In : Calorimetry for High Energy Frontier, Lyon, France, 2 - 6 Oct 2017

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2017-12-15
15:25
TOP2017 Experimental summary / Giammanco, Andrea (Louvain U.) /ATLAS and CMS Collaborations
At the time of the 10th International Workshop on Top Quark Physics (TOP2017), top quark physics is a very dynamic research area. Thanks to the unprecedentedly fast accumulation of high-energy data at the LHC during the ongoing Run~2, most of the traditional top-quark analyses are experiencing the luxury of having to worry about how to punch through the ``Systematics Wall'', and think about new ways to maximize the utility of their data. New processes involving top quarks are being studied for the first time, and the good old pair-production processes are being explored in unusual settings, such as collisions involving heavy ions, or ``reference data'' collected by the LHC at relatively low centre-of-mass energy. [...]
CMS-CR-2017-429.- Geneva : CERN, 2017 - 17 p. Fulltext: PDF;
In : 10th International Workshop on Top Quark Physics, Braga, Portugal, 17 - 22 Sep 2017

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2017-12-15
15:25
Measurement of the tZq cross section at 13 TeV with the CMS detector / Tonon, Nicolas (Strasbourg, IPHC) /CMS Collaboration
Evidence is presented for standard model production of a Z boson in association with a single top quark. The analysis uses a data sample of proton-proton collisions at $\sqrt{s} = 13$ TeV recorded in 2016 by the CMS detector, corresponding to an integrated luminosity of 35.9 fb$^{-1}$. [...]
CMS-CR-2017-427.- Geneva : CERN, 2017 - 6 p. Fulltext: PDF;
In : 10th International Workshop on Top Quark Physics, Braga, Portugal, 17 - 22 Sep 2017

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