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CERN Preprints

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2021-06-24
04:14
MadFlow: automating Monte Carlo simulation on GPU for particle physics processes / Carrazza, Stefano ; Cruz-Martinez, Juan (Milan U.) ; Rossi, Marco (Milan U. ; CERN) ; Zaro, Marco (Milan U.)
We present MadFlow, a first general multi-purpose framework for Monte Carlo (MC) event simulation of particle physics processes designed to take full advantage of hardware accelerators, in particular, graphics processing units (GPUs). [...]
arXiv:2106.10279 ; TIF-UNIMI-2021-9. - 7 p.
Fulltext

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2021-06-24
04:14
Design of the third-generation lead-based neutron spallation target for the n_TOF facility at the European Laboratory for Particle Physics / Thermomechanical Metallurgy Laboratory, PX Group Chair, Ecole Polytechnique Fédérale de Lausanne Collaboration
The neutron time-of-flight (n_TOF) facility at the European Laboratory for Particle Physics (CERN) is a pulsed white-spectrum neutron spallation source producing neutrons for two experimental areas: the Experimental Area 1 (EAR1), located 185 m horizontally from the target, and the Experimental Area 2 (EAR2), located 20 m above the target. [...]
arXiv:2106.11242. - 17 p.

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2021-06-23
20:20
Fragmentation of jets containing a prompt $\mathrm{J}/\psi$ meson in PbPb and pp collisions at $ {\sqrt {\smash [b]{s_{_{\mathrm {NN}}}}}} = $ 5.02 TeV
Jets containing a prompt $\mathrm{J}/\psi$ meson are studied in lead-lead collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV, using the CMS detector at the LHC. [...]
CERN-EP-2021-104 ; CMS-HIN-19-007-003. - 2021.
Additional information for the analysis - CMS AuthorList - Fulltext

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2021-06-23
18:43
Test-beam and simulation studies for the CLICTD technology demonstrator - a monolithic CMOS pixel sensor with a small collection diode / Dort, Katharina (Justus-Liebig-Universitaet Giessen (DE))
The CLIC Tracker Detector (CLICTD) is a monolithic pixel sensor featuring pixels of 30 μm × 37.5 μm and a small collection diode. The sensor is fabricated in a 180 nm CMOS imaging process, using two different pixel flavours: the first with a continuous n-type implant for full lateral depletion, and the second with a segmentation in the n-type implant for accelerated charge collection. [...]
CLICdp-Conf-2021-003.- Geneva : CERN, 2021 - 5. Fulltext: PDF;
In : International Conference on Technology and Instrumentation in Particle Physics , Online, Online, 24 - 29 May 2021

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2021-06-23
06:01
Design and Fabrication of the 1.9 K Magnet Test Facility at BNL, and Test of the First 4-m-Long MQXF Coil / Muratore, Joseph (Brookhaven Natl. Lab.) ; Anerella, Michael (Brookhaven Natl. Lab.) ; Joshi, Piyush (Brookhaven Natl. Lab.) ; Kovach, Paul (Brookhaven Natl. Lab.) ; Marone, Andrew (Brookhaven Natl. Lab.) ; Wanderer, Peter (Brookhaven Natl. Lab.)
The future high luminosity upgrade of the Large Hadron Collider (LHC) at CERN will include 20 4.2-m-long Nb$_3$Sn high gradient quadrupole magnets, which will be components of the triplets for two LHC insertion regions. [...]
2018. - 4 p.

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2021-06-23
06:01
Fabrication and test of LARP technological quadrupole models of TQC series / Bossert, Rodger C (Fermilab) ; Ambrosio, Giorgio (Fermilab) ; Andreev, Nikolai (Fermilab) ; Barzi, Emanuela (Fermilab) ; Chlachidze, Guram (Fermilab) ; Feher, Sandor (Fermilab) ; Kashikhin, Vladimir S (Fermilab) ; Kashikhin, Vadim V (Fermilab) ; Lamm, Michael (Fermilab) ; Nobrega, Alfred (Fermilab) et al.
In support of the development of a large-aperture Nb$_3$Sn superconducting quadrupole for the Large Hadron Collider (LHC) luminosity upgrade, several two-layer technological quadrupole models of TQC series with 90 mm aperture and collar-based mechanical structure have been developed at Fermilab in collaboration with LBNL. [...]
FERMILAB-PUB-08-309-TD. - 2009. - 5 p.
Fermilab Library Server (fulltext available) - Full text

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2021-06-23
06:01
Design of Nb$_3$Sn coils for LARP long magnets. / Ambrosio, G ; Andreev, N ; Anerella, M ; Barzi, E ; Bossert, R ; Dietderich, D ; Feher, S ; Ferracin, P ; Ghosh, A ; Gourlay, S et al.
The LHC Accelerator Research Program (LARP) has a primary goal to develop, assemble, and test full size Nb$_3$Sn quadrupole magnet models for a luminosity upgrade of the Large Hadron Collider (LHC). [...]
FERMILAB-PUB-06-304-TD. - 2007. - 4 p.
Fermilab Library Server (fulltext available) - Full text

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2021-06-22
13:58
Measurement of the $t\bar{t}t\bar{t}$ production cross section in $pp$ collisions at $\sqrt{s}$=13 TeV with the ATLAS detector / ATLAS Collaboration
A measurement of four-top-quark production using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the Large Hadron Collider corresponding to an integrated luminosity of 139 fb$^{-1}$ is presented. [...]
arXiv:2106.11683 ; CERN-EP-2021-075. - 2021. - 51 p, 51 p.
Fulltext - Previous draft version - Fulltext

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2021-06-22
04:44
Backreaction from inhomogeneous matter fields during large-scale structure formation / Floerchinger, Stefan (U. Heidelberg, ITP) ; Tetradis, Nikolaos (Athens U.) ; Wiedemann, Urs Achim (CERN)
We study how inhomogeneities of the cosmological fluid fields backreact on the homogeneous part of energy density and how they modify the Friedmann equations. [...]
arXiv:2106.10184 ; CERN-TH-2021-095. - 11 p.
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2021-06-22
04:44
Indirect Detection of Secluded Supersymmetric Dark Matter / Barnes, Patrick (Michigan U., LCTP) ; Johnson, Zachary (Michigan U., LCTP) ; Pierce, Aaron (Michigan U., LCTP) ; Shakya, Bibhushan (DESY ; CERN)
Weak-scale secluded sector dark matter can reproduce the observed dark matter relic density with thermal freeze-out within that sector. [...]
arXiv:2106.09740 ; CERN-TH-2021-089 ; DESY 21-091 ; LCTP-21-13. - 30 p.
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