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CERN Document Server 286 records found  1 - 10nextend  jump to record: Search took 0.50 seconds. 
1.
New Standard for the Logarithmic Accuracy of Parton Showers / van Beekveld, Melissa (Nikhef, Amsterdam) ; Dasgupta, Mrinal (Manchester U.) ; El-Menoufi, Basem Kamal (Monash U.) ; Ferrario Ravasio, Silvia (CERN) ; Hamilton, Keith (University Coll. London) ; Helliwell, Jack (Oxford U., Theor. Phys.) ; Karlberg, Alexander (CERN) ; Monni, Pier Francesco (CERN) ; Salam, Gavin P. (Oxford U., Theor. Phys. ; U. Oxford (main)) ; Scyboz, Ludovic (Monash U.) et al.
We report on a major milestone in the construction of logarithmically accurate final-state parton showers, achieving next-to-next-to-leading-logarithmic (NNLL) accuracy for the wide class of observables known as event shapes. The key to this advance lies in the identification of the relation between critical NNLL analytic resummation ingredients and their parton-shower counterparts. [...]
arXiv:2406.02661; CERN-TH-2024-057; OUTP-24-03P.- 2025-01-03 - 7 p. - Published in : Phys. Rev. Lett. 134 (2025) 011901 Fulltext: 2406.02661 - PDF; Publication - PDF;
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2.
Introduction to the PanScales framework, version 0.1 / van Beekveld, Melissa (Nikhef, Amsterdam) ; Dasgupta, Mrinal (Manchester U.) ; El-Menoufi, Basem Kamal (Manchester U. ; Monash U.) ; Ravasio, Silvia Ferrario (CERN) ; Hamilton, Keith (U. Coll. London) ; Helliwell, Jack (Oxford U.) ; Karlberg, Alexander (CERN) ; Medves, Rok (Oxford U.) ; Monni, Pier Francesco (CERN) ; Salam, Gavin P. (Oxford U.) et al.
In this article, we document version 0.1 of the PanScales code for parton shower simulations. With the help of a few examples, we discuss basic usage of the code, including tests of logarithmic accuracy of parton showers. [...]
arXiv:2312.13275; CERN-TH-2023-238; Nikhef 2023-026; OUTP-23-16P.- 2024-06 - 25 p. - Published in : 10.21468/SciPostPhysCodeb.31 Fulltext: 2312.13275 - PDF; Publication - PDF;
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3.
Parton Showering with Higher Logarithmic Accuracy for Soft Emissions / Ferrario Ravasio, Silvia (CERN) ; Hamilton, Keith (University Coll. London) ; Karlberg, Alexander (CERN) ; Salam, Gavin P. (Oxford U., Theor. Phys. ; Oxford U.) ; Scyboz, Ludovic (Oxford U., Theor. Phys.) ; Soyez, Gregory (CERN ; IPhT, Saclay)
The accuracy of parton-shower simulations is often a limiting factor in the interpretation of data from high-energy colliders. We present the first formulation of parton showers with accuracy one order beyond state-of-the-art next-to-leading logarithms, for classes of observable that are dominantly sensitive to low-energy (soft) emissions, specifically non-global observables and subjet multiplicities. [...]
arXiv:2307.11142; CERN-TH-2023-127; OUTP-23-07P.- 2023-10-18 - 11 p. - Published in : Phys. Rev. Lett. 131 (2023) 161906 Fulltext: PDF;
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4.
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
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5.
Matching and event-shape NNDL accuracy in parton showers / Hamilton, Keith (University Coll. London) ; Karlberg, Alexander (Oxford U., Theor. Phys. ; CERN) ; Salam, Gavin P. (Oxford U., Theor. Phys. ; Oxford U.) ; Scyboz, Ludovic (Oxford U., Theor. Phys.) ; Verheyen, Rob (University Coll. London)
To explore the interplay of NLO matching and next-to-leading logarithmic (NLL) parton showers, we consider the simplest case of $\gamma^*$ and Higgs-boson decays to $q\bar q$ and $gg$ respectively. Not only should shower NLL accuracy be retained across observables after matching, but for global event-shape observables and the two-jet rate, matching can augment the shower in such a way that it additionally achieves next-to-next-to-double-logarithmic (NNDL) accuracy, a first step on the route towards general NNLL. [...]
arXiv:2301.09645; CERN-TH-2023-004.- 2023-03-28 - 42 p. Fulltext: 2301.09645 - PDF; Publication - PDF; Erratum - PDF;
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6.
Effective Field Theory descriptions of Higgs boson pair production / Gröber, Ramona (Dipartimento di Fisica e Astronomia "G.Galilei", Università di Padova and INFN, Sezione di Padova, 35131 Padova, Italy) ; Alasfar, Lina (Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany) ; Cadamuro, Luca (Université Paris-Saclay (FR)) ; Dimitriadi, Christina (University of Bonn (DE)) ; Ferrari, Arnaud (Uppsala University (SE)) ; Heinrich, Gudrun Marlen (KIT - Karlsruhe Institute of Technology (DE)) ; Ingebretsen Carlson, Tom (Stockholm University (SE)) ; Lang, Jannis (Institute for Theoretical Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany) ; Ordek, Serhat (Uppsala University (SE)) ; Pereira Sanchez, Laura (Stockholm University (SE)) et al.
Higgs boson pair production is traditionally considered to be of particular interest for a measurement of the trilinear Higgs self-coupling. Yet it can offer insights into other couplings as well, since - in an effective field theory (EFT) parameterisation of potential new physics - both the production cross section and kinematical properties of the Higgs boson pair depend on various other Wilson coefficients of EFT operators. [...]
LHCHWG-2022-004.- Geneva : CERN, 2022 - 38. LHC Higgs WG note: PDF;
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7.
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
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8.
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
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9.
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
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10.
Event Generators for High-Energy Physics Experiments / Campbell, J.M. (Fermilab) ; Diefenthaler, M. (Jefferson Lab) ; Hobbs, T.J. (Fermilab ; IIT, Chicago) ; Höche, Stefan (Fermilab) ; Isaacson, Joshua (Fermilab) ; Kling, Felix (DESY) ; Mrenna, Stephen (Fermilab) ; Reuter, J. (DESY) ; Alioli, S. (Milan Bicocca U. ; INFN, Milan Bicocca) ; Andersen, J.R. (Durham U., IPPP) et al.
We provide an overview of the status of Monte-Carlo event generators for high-energy particle physics. Guided by the experimental needs and requirements, we highlight areas of active development, and opportunities for future improvements. [...]
arXiv:2203.11110; CP3-22-12; DESY-22-042; FERMILAB-PUB-22-116-SCD-T; IPPP/21/51, JLAB-PHY-22-3576; KA-TP-04-2022; LA-UR-22-22126; LU-TP-22-12; MCNET-22-04, OUTP-22-03P; P3H-22-024; PITT-PACC 2207; UCI-TR-2022-02.- 2024-05-24 - 225 p. - Published in : 10.21468/SciPostPhys.16.5.130 Fulltext: jt - PDF; 2203.11110 - PDF; Fulltext from Publisher: PDF; External links: JLab Document Server; Fermilab Library Server; eConf
In : 2021 Snowmass Summer Study, Seattle, WA, United States, 11 - 20 July 2021, pp.
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2 Scyboz, L
1 Scyboz, L M
5 Scyboz, L.
1 Scyboz, Ludo
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