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A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps / ATLAS Collaboration
A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. [...]
arXiv:2505.13063 ; CERN-EP-2025-026. - 2025 - 62.
Fulltext - Previous draft version - Fulltext

Detaljerad journal

Measurement of jet track functions in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
Measurements of jet substructure are key to probing the energy frontier at colliders, and many of them use track-based observables which take advantage of the angular precision of tracking detectors. Theoretical calculations of track-based observables require `track functions', which characterize the transverse momentum fraction $r_q$ carried by charged hadrons from a fragmenting quark or gluon. [...]
arXiv:2502.02062; CERN-EP-2024-333.- Geneva : CERN, 2025-06-30 - 24 p. - Published in : Phys. Lett. B 868 (2025) 139680 Fulltext: ANA-STDM-2022-05-PAPER - PDF; 2502.02062 - PDF; document - PDF; External link: Previous draft version

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Search for Higgs boson decays into a $Z$ boson and a light hadronically decaying resonance in $pp$ collisions at $ \sqrt{s}$= 13 TeV with the ATLAS detector / ATLAS Collaboration
A search for decays of the Higgs boson into a $Z$ boson and a light resonance, with a mass of 0.5-3.5 GeV, is performed using the full 140 fb$^{-1}$ dataset of 13 TeV proton-proton collisions recorded by the ATLAS detector during Run 2 of the LHC. Leptonic decays of the $Z$ boson and hadronic decays of the light resonance are considered. [...]
arXiv:2411.16361; CERN-EP-2024-261.- Geneva : CERN, 2025-06-26 - 24 p. - Published in : Phys. Lett. B 868 (2025) 139671 Fulltext: ANA-HDBS-2021-09-PAPER - PDF; 2411.16361 - PDF; document - PDF; External link: Previous draft version

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Search for a new scalar decaying into new spin-1 bosons in four-lepton final states with the ATLAS detector / Aad, Georges (Marseille, CPPM) ; Abbott, Braden Keim (Oklahoma U.) ; Abeling, Kira (Gottingen U., II. Phys. Inst.) ; Abicht, Nils Julius (Dortmund U.) ; Abidi, Haider (Brookhaven) ; Aboulhorma, Asmaa (Mohammed V U., Agdal) ; Abramowicz, Halina (Tel Aviv U.) ; Abreu, Henso (Technion) ; Abulaiti, Yiming (New York U.) ; Abusleme, Angel (Chile U., Catolica) et al.
A search is conducted for a new scalar boson $S$, with a mass distinct from that of the Higgs boson, decaying into four leptons ($\ell =$ $e$, $\mu$) via an intermediate state containing two on-shell, promptly decaying new spin-1 bosons $Z_\text{d}$: $S \rightarrow Z_\text{d}Z_\text{d} \rightarrow 4\ell$, where the $Z_\text{d}$ boson has a mass between 15 and 300 GeV, and the $S$ boson has a mass between either 30 and 115 GeV or 130 and 800 GeV. The search uses proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider with an integrated luminosity of 139 fb$^{-1}$ at a centre-of-mass energy of $\sqrt{s}=13$ TeV. [...]
arXiv:2410.16781; CERN-EP-2024-248.- Geneva : CERN, 2025-04-16 - 36 p. - Published in : Phys. Lett. B 865 (2025) 139472 Fulltext: 2410.16781 - PDF; publication - PDF; External link: Previous draft version

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Measurement of top-quark pair production in association with charm quarks in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
Inclusive cross-sections for top-quark pair production in association with charm quarks are measured with proton-proton collision data at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 140 fb$^{-1}$, collected with the ATLAS experiment at the LHC between 2015 and 2018. The measurements are performed by requiring one or two charged leptons (electrons and muons), two $b$-tagged jets, and at least one additional jet in the final state. [...]
arXiv:2409.11305; CERN-EP-2024-242.- Geneva : CERN, 2024-12-04 - 28 p. - Published in : Phys. Lett. B 860 (2025) 139177 Fulltext: 2409.11305 - PDF; Publication - PDF; External link: Previous draft version

Detaljerad journal

Combination of searches for singly and doubly charged Higgs bosons produced via vector-boson fusion in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
A combination of searches for singly and doubly charged Higgs bosons, $H^{\pm}$ and $H^{\pm\pm}$, produced via vector-boson fusion is performed using 140 fb$^{-1}$ of proton-proton collisions at a centre-of-mass energy of 13 TeV, collected with the ATLAS detector during Run 2 of the Large Hadron Collider. Searches targeting decays to massive vector bosons in leptonic final states (electrons or muons) are considered. [...]
arXiv:2407.10798; CERN-EP-2024-189.- Geneva : CERN, 2024-11-20 - 21 p. - Published in : Phys. Lett. B 860 (2025) 139137 Fulltext: 2407.10798 - PDF; Publication - PDF; External link: Previous draft version

Detaljerad journal

Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector / ATLAS Collaboration
This Letter presents a constraint on the total width of the Higgs boson ($\Gamma_H$) using a combined measurement of on-shell Higgs boson production and the production of four top quarks, which involves contributions from off-shell Higgs boson-mediated processes. This method relies on the assumption that the tree-level Higgs-top Yukawa coupling strength is the same for on-shell and off-shell Higgs boson production processes. [...]
arXiv:2407.10631; CERN-EP-2024-190.- Geneva : CERN, 2025-01-20 - 21 p. - Published in : Phys. Lett. B 861 (2025) 139277 Fulltext: 2407.10631 - PDF; Publication - PDF; External link: Previous draft version

Detaljerad journal

ATLAS searches for additional scalars and exotic Higgs boson decays with the LHC Run 2 dataset / ATLAS Collaboration
This report reviews the published results of searches for possible additional scalar particles and exotic decays of the Higgs boson performed by the ATLAS Collaboration using up to 140 fb$^{-1}$ of 13 TeV proton-proton collision data collected during Run 2 of the Large Hadron Collider. Key results are examined, and observed excesses, while never statistically compelling, are noted. [...]
arXiv:2405.04914; CERN-EP-2024-094.- Geneva : CERN, 2024-10-09 - 109 p. - Published in : Phys. Rep. 1116 (2025) 184-260 Fulltext: PDF; External link: Previous draft version

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Search for pair production of boosted Higgs bosons via vector-boson fusion in the $b\bar{b}b\bar{b}$ final state using $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector / ATLAS Collaboration
A search for Higgs boson pair production via vector-boson fusion is performed in the Lorentz-boosted regime, where a Higgs boson candidate is reconstructed as a single large-radius jet, using 140 fb$^{-1}$ of proton-proton collision data at $\sqrt{s} = 13$ TeV recorded by the ATLAS detector at the Large Hadron Collider. Only Higgs boson decays into bottom quark pairs are considered. [...]
arXiv:2404.17193; CERN-EP-2024-092.- Geneva : CERN, 2024-09-11 - 26 p. - Published in : Phys. Lett. B 858 (2024) 139007 Fulltext: 2404.17193 - PDF; Publication - PDF; External link: Previous draft version

Detaljerad journal

10.

Climbing to the top of the ATLAS 13 TeV data / Aad, Georges (Marseille, CPPM) ; Aakvaag, Erlend (Bergen U.) ; Abbott, Braden Keim (Oklahoma U.) ; Abdelhameed, Sara (New York U., Abu Dhabi) ; Abeling, Kira (Gottingen U., II. Phys. Inst.) ; Abicht, Nils Julius (Dortmund U.) ; Abidi, Haider (Brookhaven) ; Aboelela, Mohammed (Southern Methodist U.) ; Aboulhorma, Asmaa (Mohammed V U., Agdal) ; Abramowicz, Halina (Tel Aviv U.) et al.
The large amount of data recorded with the ATLAS detector at the Large Hadron Collider, corresponding to 140 fb$^{-1}$ of $pp$ collisions at a centre-of-mass energy of $\sqrt{s}=13$ TeV, has brought our knowledge of the top quark to the next level. The measurement of the top-antitop quark pair-production cross-section has reached a precision of 1.8% and the cross-section was measured differentially up to several TeV in several observables including the top-quark transverse momentum and top-quark-pair invariant mass. [...]
arXiv:2404.10674; CERN-EP-2024-099.- Geneva : CERN, 2025-01-20 - 88 p. - Published in : Phys. Rep. 1116 (2025) 127-183 Fulltext: 2404.10674 - PDF; publication - PDF; External link: Previous draft version

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