CERN Accelerating science

CERN Preprints

Последние добавления:
2017-06-26
15:05
Commissioning and integration testing of the DAQ system for the CMS GEM upgrade / Castaneda Hernandez, Alfredo Martin (Texas A-M) /CMS Collaboration
The CMS muon system will undergo a series of upgrades in the coming years to preserve and extend its muon detection capabilities during the High Luminosity LHC.The first of these will be the installation of triple-foil GEM detectors in the CMS forward region with the goal of maintaining trigger rates and preserving good muon reconstruction, even in the expected harsh environment.In 2017 the CMS GEM project is looking to achieve a major milestone in the project with the installation of 5 super-chambers in CMS; this exercise will allow for the study of services installation and commissioning, and integration with the rest of the subsystems for the first time. An overview of the DAQ system will be given with emphasis on the usage during chamber quality control testing, commissioning in CMS, and integration with the central CMS system..
CMS-CR-2017-163.- Geneva : CERN, 2017 - 5 p. Fulltext: PDF;
In : International Conference on Technology and Instrumentation in Particle Physics 2017, Beijing, China, 21 - 26 May 2017

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2017-06-26
14:09
Operational Experience with Radioactive Source Calibration of the CMS Hadron Endcap Calorimeter Wedges with Phase I Upgrade Electronics / Bilki, Burak (Iowa U.) /CMS Collaboration
The Phase I Upgrade of the CMS Hadron Endcap Calorimeters consist of new photodetectors (Silicon Photomultipliers in place of Hybrid Photo-Diodes) and front-end electronics (QIE11). The upgrade will allow the elimination of the high amplitude noise and drifting response of the Hybrid Photo-Diodes, at the same time enabling the mitigation of the radiation damage of the scintillators and the wavelength shifting fibers with a larger spectral acceptance of the Silicon Photomultipliers. [...]
CMS-CR-2017-171.- Geneva : CERN, 2017 - 5 p. Fulltext: PDF;
In : International Conference on Technology and Instrumentation in Particle Physics 2017, Beijing, China, 21 - 26 May 2017

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2017-06-26
14:09
Commissioning of the CMS Hadron Forward Calorimeters Phase I Upgrade / Bilki, Burak (Iowa U.) /CMS Collaboration
The final phase of the CMS Hadron Forward Calorimeters Phase I upgrade is being performed during the Extended Year End Technical Stop of 2016 â?? 2017. In the framework of the upgrade, the PMT boxes are being 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-2017-170.- Geneva : CERN, 2017 - 5 p. Fulltext: PDF;
In : International Conference on Technology and Instrumentation in Particle Physics 2017, Beijing, China, 21 - 26 May 2017

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2017-06-26
14:09
Searches for dark matter at CMS in events with missing transverse energy / Laner Ogilvy, Christian (Imperial Coll., London) /CMS Collaboration
Many theories predict candidates to the dark matter particles that are light enough to be produced at the LHC. This talk presents the searches for dark matter at CMS in events with missing transverse energy, focusing on the recent results obtained using data collected in 2016..
CMS-CR-2017-165.- Geneva : CERN, 2017 - 7 p. Fulltext: PDF;
In : 25th International Workshop on Deep Inelastic Scattering and Related Topics, Birmingham, UK, 03 - 07 Apr 2017

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2017-06-26
14:09
Higgs boson measurements and extended scalar sector searches in fermionic final states / Lenz, Teresa (DESY) /CMS Collaboration
Latest results of SM Higgs measurements in the fermionic final state are presented, as well as results of searches for BSM Higgs bosons using the CMS detector at LHC. Results are based on pp collision data collected at centre-of-mass energies of 8 and 13 TeV. [...]
CMS-CR-2017-164.- Geneva : CERN, 2017 - 6 p. Fulltext: PDF;
In : 25th International Workshop on Deep Inelastic Scattering and Related Topics, Birmingham, UK, 03 - 07 Apr 2017

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2017-06-26
13:13
Exclusive and semi-exclusive $\pi^{+}\pi^{-}$ production in proton-proton collisions at $\sqrt{s} = $ 7 TeV
A measurement is presented of the exclusive and semi-exclusive production of charged pion pairs in proton-proton collisions, $\mathrm{ p p }\to\mathrm{ p }({\mathrm{p}^*} )+ \pi^{+}\pi^{-}+ \mathrm{ p } ({\mathrm{p}^*} )$, where the $\pi^{+} \pi^{-}$ pair is emitted at central rapidities, and the scattered protons stay intact ($\mathrm{p}$) or diffractively dissociate (${\mathrm{p}^*} $) without detection. [...]
CERN-EP-2016-261 ; CMS-FSQ-12-004-005.
- 2017.
Additional information for the analysis - CMS AuthorList - Fulltext

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2017-06-26
07:19
Event activity-dependence of jet production in p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV measured with semi-inclusive hadron+jet correlations by ALICE / Krizek, Filip /for the ALICE
We report measurement of the semi-inclusive distribution of charged-particle jets recoiling from a high transverse momentum ($p_{\rm T}$) hadron trigger, for p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV, in p-Pb events classified by event activity. This observable has been measured in pp and Pb-Pb collisions at the LHC, providing a new probe to measure quenching. [...]
arXiv:1706.07612.- 2017-06-23 Fulltext: PDF;

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2017-06-26
07:19
The Single-Phase ProtoDUNE Technical Design Report / Abi, B. (Oxford U.) ; Acciarri, R. (Fermilab) ; Acero, M.A. (U. Atlantico, Barranquilla) ; Adamowski, M. (Fermilab) ; Adams, C. (Yale U.) ; Adamson, P. (Fermilab) ; Ahmad, Z. (Calcutta, VECC) ; Albright, C.H. (Fermilab) ; Alion, T. (South Carolina U.) ; Amador, E. (Texas U., Arlington) et al. /DUNE
ProtoDUNE-SP is the single-phase DUNE Far Detector prototype that is under construction and will be operated at the CERN Neutrino Platform (NP) starting in 2018. ProtoDUNE-SP, a crucial part of the DUNE effort towards the construction of the first DUNE 10-kt fiducial mass far detector module (17 kt total LAr mass), is a significant experiment in its own right. [...]
FERMILAB-DESIGN-2017-02; arXiv:1706.07081.- 2017-06-21 - 165 p. Fulltext: PDF; External link: FERMILABDESIGN

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2017-06-25
23:07
Measurement of the semileptonic $\mathrm{ t \bar{t} }$+$\gamma$ production cross section in pp collisions at $\sqrt{s}=$ 8 TeV
A measurement of the cross section for top quark-antiquark ($\mathrm{ t \bar{t} }$) pairs produced in association with a photon in proton-proton collisions at $\sqrt{s}=$ 8 TeV is presented. [...]
CERN-EP-2017-112 ; CMS-TOP-14-008-003.
- 2017.
Additional information for the analysis - CMS AuthorList - Fulltext

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2017-06-24
09:59
Status of the Charged Higgs Boson in Two Higgs Doublet Models / Arbey, A. ; Mahmoudi, F. ; Stal, O. ; Stefaniak, T.
The existence of charged Higgs boson(s) is inevitable in models with two (or more) Higgs doublets. Hence, their discovery would constitute unambiguous evidence for new physics beyond the Standard Model (SM). [...]
CERN-TH-2017-137; SCIPP-17-07; arXiv:1706.07414.- 2017-06-22 - 35 p. Fulltext: PDF;

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