CERN Accelerating science

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1.
Search for quantum black hole production in lepton+jet final states using proton--proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector / ATLAS Collaboration
A search for quantum black holes in electron+jet and muon+jet invariant mass spectra is performed with 140 $fb^{-1}$ of data collected by the ATLAS detector in proton--proton collisions at $\sqrt{s}$ = 13 TeV at the Large Hadron Collider. The observed invariant mass spectrum of lepton+jet pairs is consistent with Standard Model expectations. [...]
arXiv:2307.14967; CERN-EP-2023-117.- Geneva : CERN, 2024-02-01 - 28 p. - Published in : 10.1103/PhysRevD.109.032010 Fulltext: EXOT-2018-14-002 - PDF; 2307.14967 - PDF; External link: Previous draft version
2.
The ATLAS EventIndex: a BigData catalogue for all ATLAS experiment events / Barberis, Dario (Genoa U. ; INFN, Genoa ; LBL, Berkeley) ; Aleksandrov, Igor (Dubna, JINR) ; Alexandrov, Evgeny (Dubna, JINR) ; Baranowski, Zbigniew (CERN) ; Canali, Luca (CERN) ; Cherepanova, Elizaveta (Nikhef, Amsterdam) ; Dimitrov, Gancho (CERN) ; Favareto, Andrea (Genoa U. ; INFN, Genoa ; LBL, Berkeley) ; Casani, Alvaro Fernandez (Valencia U., IFIC) ; Gallas, Elizabeth J. (Oxford U.) et al.
The ATLAS EventIndex system comprises the catalogue of all events collected, processed or generated by the ATLAS experiment at the CERN LHC accelerator, and all associated software tools to collect, store and query this information. ATLAS records several billion particle interactions every year of operation, processes them for analysis and generates even larger simulated data samples; a global catalogue is needed to keep track of the location of each event record and be able to search and retrieve specific events for in-depth investigations. [...]
arXiv:2211.08293.- 2023-03-11 - 21 p. - Published in : Comput. Softw. Big Sci. 7 (2023) 2 Fulltext: PDF;
3.
Second Analysis Ecosystem Workshop Report / Aly, Mohamed (Manchester U.) ; Burzynski, Jackson (Simon Fraser U.) ; Cardwell, Bryan (Virginia U.) ; Craik, Daniel C. (Zurich U.) ; van Daalen, Tal (Washington U., Seattle) ; Dado, Tomas (Dortmund U.) ; Das, Ayanabha (Prague, Tech. U.) ; Delgado Peris, Antonio (Madrid, CIEMAT) ; Doglioni, Caterina (Manchester U.) ; Elmer, Peter (Princeton U.) et al.
The second workshop on the HEP Analysis Ecosystem took place 23-25 May 2022 at IJCLab in Orsay, to look at progress and continuing challenges in scaling up HEP analysis to meet the needs of HL-LHC and DUNE, as well as the very pressing needs of LHC Run 3 analysis. [...]
arXiv:2212.04889 ; HSF-DOC-2022-02 ; FERMILAB-CONF-22-955-PPD.
- 2022. - 27 p.
Fermilab Library Server - Fulltext - Fulltext
4.
Measurement of the inclusive $t\bar{t}$ production cross section in the lepton+jets channel in $pp$ collisions at $\sqrt{s}$= 7 TeV with the ATLAS detector using support vector machines / ATLAS Collaboration
A measurement of the top quark pair-production cross section in the lepton+jets decay channel is presented. It is based on 4.6 fb$^{-1}$ of $\sqrt{s} = 7$ TeV $pp$ collision data collected during 2011 by the ATLAS experiment at the CERN Large Hadron Collider. [...]
arXiv:2212.00571; CERN-EP-2022-191.- Geneva : CERN, 2023-08-01 - 34 p. - Published in : Phys. Rev. D 108 (2023) 032014 Fulltext: 2212.00571 - PDF; Publication - PDF; External link: Previous draft version
5.
Measurement of the top-quark mass using a leptonic invariant mass in $pp$ collisions at $\sqrt{s}=13~\textrm{TeV}$ with the ATLAS detector / ATLAS Collaboration
A measurement of the top-quark mass ($m_t$) in the $t\bar{t}\rightarrow~\textrm{lepton}+\textrm{jets}$ channel is presented, with an experimental technique which exploits semileptonic decays of $b$-hadrons produced in the top-quark decay chain. The distribution of the invariant mass $m_{\ell\mu}$ of the lepton, $\ell$ (with $\ell=e,\mu$), from the $W$-boson decay and the muon, $\mu$, originating from the $b$-hadron decay is reconstructed, and a binned-template profile likelihood fit is performed to extract $m_t$. [...]
arXiv:2209.00583; CERN-EP-2020-018.- Geneva : CERN, 2023-06-05 - 54 p. - Published in : JHEP 2306 (2023) 019 Fulltext: 2209.00583 - PDF; document - PDF; External link: Previous draft version
6.
Measurement of cross-sections for production of a $Z$ boson in association with a flavor-inclusive or doubly $b$-tagged large-radius jet in proton-proton collisions at $\sqrt{s} = 13~$TeV with the ATLAS experiment / ATLAS Collaboration
We present measurements of cross-sections for production of a leptonically decaying $Z$ boson in association with a large-radius jet in 13 TeV proton-proton collisions at the LHC, using $36~\mathrm{fb}^{-1}$ of data from the ATLAS detector. Integrated and differential cross-sections are measured at particle-level in both a flavor-inclusive and a doubly $b$-tagged fiducial phase-space. [...]
arXiv:2204.12355; CERN-EP-2021-140.- 2023-07-31 - 32 p. - Published in : Phys. Rev. D 108 (2023) 012022 Fulltext: 2204.12355 - PDF; Publication - PDF; External link: Previous draft version
7.
Measurements of jet observables sensitive to $b$-quark fragmentation in $t\bar{t}$ events at the LHC with the ATLAS detector / ATLAS Collaboration
Several observables sensitive to the fragmentation of $b$-quarks into $b$-hadrons are measured using 36 fb${}^{-1}$ of $\sqrt s = 13$ TeV proton--proton collision data collected with the ATLAS detector at the LHC. Jets containing $b$-hadrons are obtained from a sample of dileptonic $t\bar{t}$ events, and the associated set of charged-particle tracks is separated into those from the primary $pp$ interaction vertex and those from the displaced $b$-decay secondary vertex. [...]
arXiv:2202.13901; CERN-EP-2021-116.- Geneva : CERN, 2022-08-01 - 49 p. - Published in : Phys. Rev. D 106 (2022) 032008 Fulltext: PDF; Fulltext from publisher: PDF; External link: Previous draft version
8.
Two-particle Bose–Einstein correlations in ${ pp }$ collisions at $\mathbf {\sqrt{s} = 13}$ TeV measured with the ATLAS detector at the LHC / ATLAS Collaboration
This paper presents studies of Bose-Einstein correlations (BEC) in proton-proton collisions at a centre-of-mass energy of 13 TeV, using data from the ATLAS detector at the CERN Large Hadron Collider. Data were collected in a special low-luminosity configuration with a minimum-bias trigger and a high-multiplicity track trigger, accumulating integrated luminosities of 151 $\mu$b$^{-1}$ and 8.4 nb$^{-1}$ respectively. [...]
arXiv:2202.02218; CERN-EP-2021-172.- Geneva : CERN, 2022-07-11 - 38 p. - Published in : Eur. Phys. J. C 82 (2022) 608 Fulltext: 2202.02218 - PDF; document - PDF; External link: Previous draft version
9.
The ATLAS EventIndex using the Hbase/Phoenix storage solution / ATLAS Collaboration
The ATLAS EventIndex provides a global event catalogue and event-level metadata for ATLAS analysis groups and users. [...]
ATL-SOFT-PROC-2021-020.
- 2021. - 10 p.
Original Communication (restricted to ATLAS) - Full text - Fulltext
10.
The ATLAS EventIndex using the HBase/Phoenix storage solution / ATLAS Collaboration
The ATLAS EventIndex provides a global event catalogue and event-level metadata for ATLAS analysis groups and users. The LHC Run 3, starting in 2022, will see increased data-taking and simulation production rates, with which the current infrastructure would still cope but may be stretched to its limits by the end of Run 3. [...]
ATL-SOFT-SLIDE-2021-306.- Geneva : CERN, 2021 - 29 p. Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : 9th International Conference on Distributed Computing and Grid Technologies in Science and Education (GRID 2021), Dubna, Russian Federation, 5 - 9 Jul 2021

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