CERN Accelerating science

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1.
ALICE upgrades during the LHC Long Shutdown 2 / ALICE Collaboration
A Large Ion Collider Experiment (ALICE) has been conceived and constructed as a heavy-ion experiment at the LHC. During LHC Runs 1 and 2, it has produced a wide range of physics results using all collision systems available at the LHC. [...]
arXiv:2302.01238; CERN-EP-2023-009.- Geneva : CERN, 2024-05-23 - 159 p. - Published in : JINST 19 (2024) P05062 Draft (restricted): PDF; Fulltext: document - PDF; 2302.01238 - PDF;
In : The Large Hadron Collider and The Experiments for Run 3
2.
Electromagnetic physics vectorization in the GeantV transport framework / Amadio, Guilherme (CERN) ; Ananya (CERN) ; Apostolakis, John (CERN) ; Bandieramonte, Marilena (CERN ; U. Pittsburgh (main)) ; Behera, S P (Bhabha Atomic Res. Ctr.) ; Bhattacharyya, Abhijit (Bhabha Atomic Res. Ctr.) ; Brun, Rene (CERN) ; Canal, Philippe (Fermilab) ; Carminati, Federico (CERN) ; Cosmo, Gabriele (CERN) et al.
The development of the GeantV Electromagnetic (EM) physics package has evolved following two necessary paths towards code modernization. A first phase required the revision of the main electromagnetic physics models and their implementation. [...]
2019 - 11 p. - Published in : EPJ Web Conf. 214 (2019) 02031 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.02031
3.
A vectorization approach for multifaceted solids in VecGeom / Apostolakis, John (CERN) ; Cosmo, Gabriele (CERN) ; Gheata, Andrei (CERN) ; Gheata, Mihaela (CERN ; Bucharest, Inst. Space Science) ; Sehgal, Raman (Bhabha Atomic Res. Ctr.) ; Wenzel, Sandro (CERN) /VecGeom team
VecGeom [1] is a multi-purpose geometry library targeting the optimisation of the 3D-solids’ algorithms used extensively in particle transport and tracking applications. The implementations of these algorithms are templated on the input data type and are vectorised based on the VecCore [2] abstraction library in case of multiple inputs in a SIMD vector. [...]
2019 - 7 p. - Published in : EPJ Web Conf. 214 (2019) 02025 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.02025
4.
Recent progress with the top to bottom approach to vectorization in GeantV / Amadio, Guilherme (CERN) ; Ananya ; Apostolakis, John (CERN) ; Bandieramonte, Marilena (CERN ; U. Pittsburgh (main)) ; Behera, Shiba (Bhabha Atomic Res. Ctr.) ; Bhattacharyya, Abhijit (Bhabha Atomic Res. Ctr.) ; Brun, René (CERN) ; Canal, Philippe (Fermilab) ; Carminati, Federico (CERN) ; Cosmo, Gabriele (CERN) et al.
SIMD acceleration can potentially boost by factors the application throughput. Achieving efficient SIMD vectorization for scalar code with complex data flow and branching logic, goes however way beyond breaking some loop dependencies and relying on the compiler. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 02007 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.02007
5.
A Roadmap for HEP Software and Computing R&D for the 2020s / HEP Software Foundation Collaboration
Particle physics has an ambitious and broad experimental programme for the coming decades. This programme requires large investments in detector hardware, either to build new facilities and experiments, or to upgrade existing ones. [...]
arXiv:1712.06982; HSF-CWP-2017-01; HSF-CWP-2017-001; FERMILAB-PUB-17-607-CD.- 2019-03-20 - 49 p. - Published in : Comput. Softw. Big Sci. 3 (2019) 7 Fulltext: 1712.06982 - PDF; fermilab-pub-17-607-cd - PDF; Fulltext from Publisher: PDF; Preprint: PDF; External link: Fermilab Library Server (fulltext available)
6.
Implementation of extensions in USolids / Gheata, Mihaela (CERN)
AIDA-2020-D3.1.- Geneva : CERN, 2017 AIDA-2020, 3.1 Fulltext: 1.PDF;
7.
GeantV: from CPU to accelerators / Canal, Philippe (Fermilab) ; Carminati, Federico (CERN) ; Gheata, Andrei (CERN ; NIKHEF, Amsterdam) ; Wenzel, Sandro (Leipzig U.) ; Jun, Soon Yung (Unlisted) ; Amadio, Guilherme (Unlisted) ; Apostolakis, John (CERN) ; Arora, Anmol (Unlisted) ; Bandieramonte, Marilena (Unlisted) ; Bhattacharyya, Abhijit (Calcutta U.) et al.
SISSA, 2016 - 10 p. - Published in : PoS ICHEP2016 (2016) 177 Fulltext: PDF; External link: PoS server
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016, pp.177
8.
Measurement of electrons from beauty-hadron decays in p-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV and Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV / ALICE Collaboration
The production of beauty hadrons was measured via semi-leptonic decays at mid-rapidity with the ALICE detector at the LHC in the transverse momentum interval $1<p_{\rm T}<8$ GeV/$c$ in minimum-bias p–Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV and in $1.3<p_{\rm T}<8$ GeV/$c$ in the 20% most central Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV. The pp reference spectra at $\sqrt{s}=5.02$ TeV and $\sqrt{s}=2.76$ TeV, needed for the calculation of the nuclear modification factors $R_{\rm pA}$ and $R_{\rm AA}$, were obtained by a pQCD-driven scaling of the cross section of electrons from beauty-hadron decays measured at $\sqrt{s}=7$ TeV. [...]
arXiv:1609.03898; CERN-EP-2016-222; CERN-EP-2016-222.- Geneva : CERN, 2017-07-11 - 34 p. - Published in : JHEP 07 (2017) 052 Draft (restricted): PDF; Fulltext: PDF; External link: Preprint
9.
Jet-like correlations with neutral pion triggers in pp and central Pb-Pb collisions at 2.76 TeV / ALICE Collaboration
We present measurements of two-particle correlations with neutral pion trigger particles of transverse momenta $8 < p_{\mathrm{T}}^{\rm trig} < 16~\mathrm{GeV}/c$ and associated charged particles of $0.5 < p_{\mathrm{T}}^{\rm assoc} < 10~\mathrm{GeV}/c$ versus the azimuthal angle difference $\Delta\varphi$ at midrapidity in pp and central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV with ALICE. The new measurements exploit associated charged hadrons down to $0.5~\mathrm{GeV}/c$, which significantly extends our previous measurement that only used charged hadrons above $3~\mathrm{GeV}/c$. [...]
arXiv:1608.07201; CERN-EP-2016-195; CERN-EP-2016-195.- Geneva : CERN, 2016-12-10 - 13 p. - Published in : Phys. Lett. B 763 (2016) 238-250 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; External link: Preprint
10.
Enhanced production of multi-strange hadrons in high-multiplicity proton–proton collisions / ALICE Collaboration
At sufficiently high temperature and energy density, nuclear matter undergoes a transition to a phase in which quarks and gluons are not confined: the quark–gluon plasma (QGP). Such an exotic state of strongly interacting quantum chromodynamics matter is produced in the laboratory in heavy nuclei high-energy collisions, where an enhanced production of strange hadrons is observed. [...]
arXiv:1606.07424; CERN-EP-2016-153.- Geneva : CERN, 2017-04-24 - 17 p. - Published in : Nature Phys. 13 (2017) 535-539 Fulltext: nphys4111 - PDF; arXiv:1606.07424 - PDF; Fulltext from Publisher: PDF; External links: Interactions.org article; Symmetry Magazine article; Rivet analyses reference

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