CERN Accelerating science

CMS Conference Reports

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2018-02-15
16:50
Beam-dynamic effects at the CMS BRIL van der Meer scans / Babaev, Anton (TOMSK-POLYTEC) /CMS Collaboration
The CMS Beam Radiation Instrumentation and Luminosity Project (BRIL) is responsible for the simulation and measurement of luminosity, beam conditions and radiation fields in the CMS experiment. The project is engaged in operating and developing new detectors (luminometers), adequate for the experimental conditions associated with high values of instantaneous luminosity delivered by the CERN LHC. [...]
CMS-CR-2017-415.- Geneva : CERN, 2017 - 8 p. Fulltext: PDF;

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2018-02-15
16:34
Photon-photon measurements in CMS / Chudasama, Ruchi (Bhabha Atomic Res. Ctr.) /CMS Collaboration
We discuss the measurement of photon-photon processes using data collected by the CMS experiment in pp collisions at $\sqrt{s}$ = 7 and 8 TeV and in PbPb collisions at $\sqrt{s_{_{{\rm NN}}}}= 5.02$ TeV..
CMS-CR-2017-218.- Geneva : CERN, 2017 - 6 p. Fulltext: PDF;
In : International Conference on the Structure and the Interactions of the Photon, including the 22th International Workshop on Photon-Photon Collisions, Geneva, Switzerland, 22 - 26 May 2017

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2018-02-15
16:33
CMS Pixel detector development for the HL-LHC / Schwandt, Joern (Hamburg U.) /CMS Collaboration
An upgrade program is underway which will bring the luminosity of the LHC up to about 7.5x10$^{34}$ cm$^{-2}$s$^{-1}$ in 2027, with the goal of an integrated luminosity of 3000~fb$^{-1}$ by the end of 2037. This High Luminosity scenario, HL-LHC, will present new challenges of higher data rates and increased radiation hardness for the pixel detector (a non-ionizing fluence of 2x10$^{16}$~n$_{eq}$/cm$^2$ and an ionizing dose of 10~MGy, is expected on the inner pixel layer for 3000~fb$^{-1}$ integrated luminosity). [...]
CMS-CR-2018-018.- Geneva : CERN, 2018 - 7 p. Fulltext: PDF;
In : 11th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors (HSTD11) in conjunction with 2nd Workshop on SOI Pixel Detectors (SOIPIX2017) at OIST, Okinawa, Japan, Okinawa, Japan, 10 - 15 Dec 2017

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2018-02-15
16:32
Silicon-Based Detectors at the HL-LHC / Hartmann, Frank (KIT, Karlsruhe, EKP) /ALICE,ATLAS,CMS and LHCB Collaborations
This document discusses the silicon-based detectors planned for the High Luminosity LHC. The special aspects to cope with the new environment and its challenges, e.g. [...]
CMS-CR-2018-015.- Geneva : CERN, 2018 - 12 p. Fulltext: PDF;
In : 11th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors (HSTD11) in conjunction with 2nd Workshop on SOI Pixel Detectors (SOIPIX2017) at OIST, Okinawa, Japan, Okinawa, Japan, 10 - 15 Dec 2017

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2018-02-05
11:25
Alignment of the upgraded CMS pixel detector / Schroder, Matthias (KIT, Karlsruhe, EKP) /CMS Collaboration
The all-silicon tracking system of the CMS experiment provides excellent resolution for charged tracks and an efficient tagging of heavy-flavour jets. After a new pixel detector has been installed during the LHC technical stop at the beginning of 2017, the positions, orientations, and surface curvatures of the sensors needed to be determined with a precision at the order of a few micrometres to ensure the required physics performance. [...]
CMS-CR-2018-019.- Geneva : CERN, 2018 - 7 p. Fulltext: PDF;
In : 11th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors (HSTD11) in conjunction with 2nd Workshop on SOI Pixel Detectors (SOIPIX2017) at OIST, Okinawa, Japan, Okinawa, Japan, 10 - 15 Dec 2017

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2018-02-05
11:25
The CMS Outer Tracker for HL-LHC / Dierlamm, Alexander Hermann (KIT, Karlsruhe, EKP) /CMS Collaboration
The LHC is planning an upgrade program, which will bring the luminosity to about $5-7\times10^{34}$~cm$^{-2}$s$^{-1}$ in 2026, with a goal of an integrated luminosity of 3000 fb$^{-1}$ by the end of 2037. This High Luminosity LHC scenario, HL-LHC, will require a preparation program of the LHC detectors known as Phase-2 Upgrade. [...]
CMS-CR-2018-014.- Geneva : CERN, 2018 - 7 p. Fulltext: PDF;
In : 11th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors (HSTD11) in conjunction with 2nd Workshop on SOI Pixel Detectors (SOIPIX2017) at OIST, Okinawa, Japan, Okinawa, Japan, 10 - 15 Dec 2017

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2018-02-05
11:25
Performance of the CMS Phase 1 Pixel Detector / Akgun, Bora (CERN) /CMS Collaboration
It is anticipated that the LHC accelerator will reach and exceed the luminosity of L = 2$\times$10$^{34}$cm$^{-2}$s$^{-1}$ during the LHC Run 2 period until 2023. At this higher luminosity and increased hit occupancies the CMS phase-0 pixel detector would have been subjected to severe dead time and inefficiencies introduced by limited buffers in the analog read-out chip and effects of radiation damage in the sensors. [...]
CMS-CR-2018-012.- Geneva : CERN, 2018 - 7 p. Fulltext: PDF;
In : 11th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors (HSTD11) in conjunction with 2nd Workshop on SOI Pixel Detectors (SOIPIX2017) at OIST, Okinawa, Japan, Okinawa, Japan, 10 - 15 Dec 2017

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2018-02-05
11:09
Higgs boson results on couplings to fermions, CP parameters and perspectives for high-lumi LHC (ATLAS AND CMS) / Brandstetter, Johannes (Vienna, OAW) /ATLAS and CMS Collaborations
This talk summarizes latest ATLAS and CMS results on Higgs boson couplings to fermions. Presented topics include decays into final states of pairs of tau leptons and pairs of bottom quarks as well as results on the ttH production mode. [...]
CMS-CR-2018-001.- Geneva : CERN, 2018 - 7 p. Fulltext: PDF;
In : 2017 International Workshop on Future Linear Colliders, Strasbourg, France, 23 - 27 Oct 2017

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2018-02-05
11:04
Performance of new radiation tolerant thin n-in-p Silicon pixel sensors for the CMS experiment at High Luminosity LHC / Dalla Betta, G.F ; Boscardin, M ; Darbo, G ; Dinardo, Mauro (INFN, Milan Bicocca ; Milan Bicocca U.) ; Giacomini, G ; Menasce, Dario (INFN, Milan Bicocca) ; Meschini, Marco (INFN, Florence) ; Messineo, Alberto (INFN, Pisa ; Pisa U.) ; Moroni, Luigi (INFN, Milan Bicocca) ; Rivera, Ryan Allen (Fermilab) et al.
The High Luminosity upgrade of the CERN-LHC (HL-LHC) demands for a new high-radiation tolerant solid-state pixel sensor capable of surviving fluencies up to a few 10$^{16}$ particles/cm$^2$ at $\sim$3 cm from the interaction point. To this extent the INFN ATLAS-CMS joint research activity in collaboration with Fondazione Bruno Kessler-FBK, is aiming at the development of thin n-in-p type pixel sensors for the HL-LHC. [...]
CMS-CR-2017-441.- Geneva : CERN, 2017 - 4 p. Fulltext: PDF;
In : 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC 2017), Atlanta, Georgia, USA, 21 - 28 Oct 2017

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2018-01-25
16:44
Results on Top physics from CMS / Krintiras, Georgios Konstantinos (Cathol. U. Louvain (main))
After the discovery of the top quark more than 20 years ago, top quark production cross sections have been meticulously studied. The rich variety of results from the LHC experiments are complemented with increasingly accurate theoretical predictions of heavy quark production and decay. Measurements of the top quark production provide a benchmark test of perturbative quantum chromodynamics and the standard model (SM), constraining at the same time the background in Higgs boson searches as well as extensions beyond the SM. Recent top quark measurements from CMS are reviewed, illustrating past and current experimental methods along with their attained precision. A perspective of top quark physics at the High-Luminosity LHC and at future colliders is briefly given..
CMS CR-2018/013 ; arXiv:1801.08398 ; CMS-CR-2018-013.
- 2018. - 45 p.
Full text - Preprint

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