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Derniers ajouts:
2017-10-23
10:25
Boosted Decision Trees in the Level-1 Muon Endcap Trigger at CMS / CMS Collaboration
The first implementation of a Machine Learning Algorithm inside a Level-1 trigger system at the LHC is presented. The Endcap Muon Track Finder (EMTF) at CMS uses Boosted Decision Trees (BDTs) to infer the momentum of muons in the forward region of the detector, based on 25 different variables [...]
CMS-CR-2017-357.- Geneva : CERN, 2017 - 6 p. Fulltext: PDF;
In : 18th International Workshop on Advanced Computing and Analysis Techniques in Physics Research, Seattle, WA, USA, 21 - 25 Aug 2017

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2017-10-23
10:24
Search for R-parity violating supersymmetry and quantum black-holes in e+mu final state in CMS / Mukherjee, Swagata (Aachen, Tech. Hochsch.) /CMS Collaboration
A search for narrow resonances decaying to an electron and a muon is performed using an integrated luminosity of 2.7 fb$^{-1}$ of 13 TeV proton-proton collision data recorded with the CMS detector at the LHC. The e$\mu$ mass spectrum is also investigated for non-resonant contributions from the production of quantum black holes (QBH). [...]
CMS-CR-2017-320.- Geneva : CERN, 2017 - 7 p. Fulltext: PDF;
In : 6th International Conference on New Frontiers in Physics, Kolymbari, Krete, Greece, 17 Aug - 26 Aug 2017

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2017-10-23
07:16
Alternatives to the stochastic "noise vector" approach / de Forcrand, Philippe ; Jaeger, Benjamin
Several important observables, like the quark condensate and the Taylor coefficients of the expansion of the QCD pressure with respect to the chemical potential, are based on the trace of the inverse Dirac operator and of its powers. [...]
arXiv:1710.07305 ; CERN-TH-2017-210 ; CP$^3$-ORIGINS-2017-44-DNRF90.
- Eight p.
Preprint

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2017-10-23
07:16
Production of $^{4}$He and $^{4}\overline{\textrm{He}}$ in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV at the LHC / ALICE Collaboration
Results on the production of $^{4}{\textrm{He}}$ and $^{4}\overline{\textrm{He}}$ nuclei in Pb-Pb collisions at $ \sqrt{s_{\mathrm{NN}}} = 2.76 $ TeV in the rapidity range $ \mid y \mid < 1$, using the ALICE detector, are presented in this paper. [...]
arXiv:1710.07531 ; CERN-EP-2017-266.
- 17 p.
Preprint

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2017-10-22
19:14
Measurement of differential cross sections in the $\phi^*$ variable for inclusive $\mathrm{Z}$ boson production in pp collisions at $\sqrt{s} = $ 8 TeV
Measurements of differential cross sections ${\mathrm{d}}\sigma / {\mathrm{d}}\phi^*$ and double-differential cross sections ${\mathrm{d}}^2\sigma / {\mathrm{d}}\phi^*{\mathrm{d}}{|y|}$ for inclusive Z boson production are presented using the dielectron and dimuon final states. [...]
CERN-EP-2017-234 ; CMS-SMP-17-002-003.
- 2017.
Additional information for the analysis - CMS AuthorList - Fulltext

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2017-10-22
14:26
Pseudorapidity and transverse momentum dependence of flow harmonics in pPb and PbPb collisionsDifferential flow harmonics v_n in pPb and PbPb collisions
Measurements of azimuthal angular correlations are presented for high-multiplicity pPb collisions at $\sqrt{s_{\mathrm{NN}}} = $ 5.02 TeV and peripheral PbPb collisions at $\sqrt{s_{\mathrm{NN}}} = $ 2.76 TeV. [...]
CERN-EP-2017-218 ; CMS-HIN-15-008-003.
- 2017.
Additional information for the analysis - CMS AuthorList - Fulltext

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2017-10-21
07:17
General heat kernel coefficients for massless free spin-3/2 Rarita-Schwinger field / Karan, Sudip (Indian Sch. Mines, Dhanbad) ; Kumar, Shashank (Indian Sch. Mines, Dhanbad) ; Panda, Binata (Indian Sch. Mines, Dhanbad ; Bhubaneswar, Inst. Phys. ; CERN ; Bhubaneswar, Inst. Phys. ; CERN ; Bhubaneswar, Inst. Phys. ; CERN ; Bhubaneswar, Inst. Phys. ; CERN)
We review the general heat kernel method for the Dirac spinor field as an elementary example in any arbitrary background. [...]
arXiv:1709.08063.
- 21 p.
Preprint

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2017-10-21
07:17
NLO and off-shell effects in top quark mass determinations / Heinrich, G. (Munich, Max Planck Inst.) ; Maier, Andreas (CERN) ; Nisius, Richard (Munich, Max Planck Inst.) ; Schlenk, Johannes (Durham U., IPPP) ; Schulze, Markus (Humboldt U., Berlin) ; Scyboz, Ludovic (Munich, Max Planck Inst.) ; Winter, Jan (Michigan State U.)
We study the impact of different theoretical descriptions of top quark pair production on top quark mass measurements in the di-lepton channel [...]
MPP-2017-197 ; IPPP-17-69 ; HU-EP-17-22 ; MSUHEP-170922 ; arXiv:1709.08615.
- 33 p.
Preprint

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2017-10-20
16:53
Functional Tests of 2S Modules for the CMS Phase-2 Tracker Upgrade with a microTCA-based Readout System / Preuten, Marius (Aachen, Tech. Hochsch.) /CMS Collaboration
First full size 2S module prototypes for the CMS Phase-2 Tracker Upgrade have been assembled. With two sensors with realistic geometries and 16 CBC2 readout chips on two front-end hybrids these allow to study the characteristics of these complex objects.A microTCA based readout system was developed to test multiple front-end hybrids simultaneously. [...]
CMS-CR-2017-367.- Geneva : CERN, 2017 - 8 p. Fulltext: PDF;
In : Topical Workshop on Electronics for Particle Physics, Santa Cruz, Ca, United States Of America, 11 - 14 Sep 2017

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2017-10-20
16:53
Design of the new front-end electronics for the readout of the upgraded CMS electromagnetic calorimeter for the HL-LHC / Cometti, Simona (INFN, Turin) ; Mazza, Gianni (INFN, Turin) /CMS Collaboration
The Compact Muon Solenoid detector was originally designed to operate for about ten years, for LHC instantaneous luminosities up to $1 \cdot 10^{34}$ cm$^{-2}$ s$^{-1}$ and integrated luminosity of 500 fb$^{-1}$. The High Luminosity LHC will increase the instantaneous luminosity by about a factor of 5 from current levels and CMS will accumulate an integrated luminosity of 3000 fb$^{-1}$ by about 2035. With such high luminosity the electromagnetic calorimeter of CMS will have to cope with a challenging increase in the number of interactions per bunch crossing and in radiation levels. [...]
CMS-CR-2017-352.- Geneva : CERN, 2017 - 6 p. Fulltext: PDF;
In : Topical Workshop on Electronics for Particle Physics, Santa Cruz, Ca, United States Of America, 11 - 14 Sep 2017

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