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Detection of Early-Universe Gravitational Wave Signatures and Fundamental Physics
/ Caldwell, Robert (Dartmouth Coll.) ; Cui, Yanou (UC, Riverside) ; Guo, Huai-Ke (U. Utah, Salt Lake City) ; Mandic, Vuk (Minnesota U.) ; Mariotti, Alberto (Brussels U., IIHE) ; No, Jose Miguel (Madrid, IFT) ; Ramsey-Musolf, Michael J. (Shanghai Jiao Tong U.) ; Sakellariadou, Mairi (King's Coll. London) ; Sinha, Kuver (U. Oklahoma, Norman) ; Wang, Lian-Tao (Chicago U.) et al.
Detection of a gravitational-wave signal of non-astrophysical origin would be a landmark discovery, potentially providing a significant clue to some of our most basic, big-picture scientific questions about the Universe. In this white paper, we survey the leading early-Universe mechanisms that may produce a detectable signal -- including inflation, phase transitions, topological defects, as well as primordial black holes -- and highlight the connections to fundamental physics. [...]
arXiv:2203.07972.-
2022-11-30 - 67 p.
Fulltext: 2203.07972 - PDF; document - PDF; External link: eConf
In : 2021 Snowmass Summer Study, Seattle, WA, United States, 11 - 20 July 2021, pp.
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Implications for First-Order Cosmological Phase Transitions from the Third LIGO-Virgo Observing Run
/ Romero, Alba (Barcelona, IFAE) ; Martinovic, Katarina (King's Coll. London) ; Callister, Thomas A. (Flatiron Inst., New York) ; Guo, Huai-Ke (Oklahoma U.) ; Martínez, Mario (Barcelona, IFAE ; ICREA, Barcelona) ; Sakellariadou, Mairi (King's Coll. London ; CERN) ; Yang, Feng-Wei (Utah U.) ; Zhao, Yue (Utah U.)
We place constrains on the normalised energy density in gravitational waves from first-order strong phase transitions using data from Advanced LIGO and Virgo's first, second and third observing runs. First, adopting a broken power law model, we place $95 \%$ confidence level upper limits simultaneously on the gravitational-wave energy density at 25 Hz from unresolved compact binary mergers, $\Omega_{\rm cbc} < 5.9 \times 10^{-9}$, and strong first-order phase transitions, $\Omega_{\rm bpl} < 2.8 \times 10^{-9}$. [...]
arXiv:2102.01714.-
2021-04-17 - 7 p.
- Published in : Phys. Rev. Lett. 126 (2021) 151301
Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from publisher: PDF;
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Building and using containers at HPC centres for the ATLAS experiment
/ Benjamin, Douglas (Duke U.) ; Childers, Taylor (Argonne (main)) ; Lesny, David (Illinois U., Urbana) ; Oleynik, Danila (Texas U., Arlington) ; Panitkin, Sergey (Brookhaven) ; Tsulaia, Vakho (LBL, Berkeley) ; Yang, Wei (SLAC) ; Zhao, Xin (Brookhaven)
/ATLAS Collaboration
The HPC environment presents several challenges to the ATLAS experiment in running their automated computational workflows smoothly and efficiently, in particular regarding issues such as software distribution and I/O load. A vital component of the LHC Computing Grid, CVMFS, is not always available in HPC environments. [...]
EDP Sciences, 2019 - 8 p.
- Published in : EPJ Web Conf. 214 (2019) 07005
Fulltext: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.07005
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Bootstrapping a new LHC data transfer ecosystem
/ Bockelman, Brian (U. Nebraska, Lincoln) ; Hanushevsky, Andrew (SLAC) ; Keeble, Oliver (CERN) ; Lassnig, Mario (CERN) ; Millar, Paul (DESY) ; Weitzel, Derek (U. Nebraska, Lincoln) ; Yang, Wei (SLAC)
GridFTP transfers and the corresponding Grid Security Infrastructure (GSI)-based authentication and authorization system have been data transfer pillars of the Worldwide LHC Computing Grid (WLCG) for more than a decade. However, in 2017, the end of support for the Globus Toolkit - the reference platform for these technologies - was announced. [...]
2019 - 9 p.
- Published in : EPJ Web Conf. 214 (2019) 04045
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.04045
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Fine-Grained Processing Towards HL-LHC Computing in ATLAS
/ Benjamin, Doug (Duke U.) ; Calafiura, Paolo (LBNL, Berkeley) ; Childers, Taylor (Argonne) ; De, Kaushik (Texas U., Arlington) ; Di Girolamo, Alessandro (CERN) ; Fullana, Esteban (Valencia U.) ; Guan, Wen (Wisconsin U., Madison) ; Maeno, Tadashi (Brookhaven Natl. Lab.) ; Magini, Nicolo (U. Genoa (main)) ; Nilsson, Paul (Brookhaven Natl. Lab.) et al.
/ATLAS
During LHC's Run-2 ATLAS has been developing and evaluating new fine-grained approaches to workflows and dataflows able to better utilize computing resources in terms of storage, processing and networks. The compute-limited physics of ATLAS has driven the collaboration to aggressively harvest opportunistic cycles from what are often transiently available resources, including HPCs, clouds, volunteer computing, and grid resources in transitional states. [...]
2018 - 1 p.
- Published in : 10.1109/eScience.2018.00083
In : 14th eScience IEEE International Conference, Amsterdam, Netherlands, 29 Oct - 1 Nov 2018, pp.338
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