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Journal articleAbud AA, Abi B, Acciarri R, et al., 2025,
Performance of a Modular Ton-Scale Pixel-Readout Liquid Argon Time Projection Chamber
, INSTRUMENTS, Vol: 8- Cite
- Citations: 2
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Journal articleChekhovsky V, Hayrapetyan A, Makarenko V, et al., 2025,
Probing Gluon Fluctuations in Nuclei with the First Energy-Dependent Measurement of Incoherent <i>J</i>/ψ Photoproduction in Ultraperipheral PbPb Collisions
, PHYSICAL REVIEW LETTERS, Vol: 135, ISSN: 0031-9007 -
Journal articleHayrapetyan A, Makarenko V, Tumasyan A, et al., 2025,
Measurements of inclusive and differential Higgs boson production cross sections at √s=13.6 TeV in the H → γγ decay channel
, JOURNAL OF HIGH ENERGY PHYSICS -
Journal articleAad G, Aakvaag E, Abbott B, et al., 2025,
Search for Higgs boson decays into a Z boson and a light hadronically decaying resonance in pp collisions at √s=13 TeV with the ATLAS detector
, Physics Letters Section B Nuclear Elementary Particle and High Energy Physics, Vol: 868, ISSN: 0370-2693A 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<sup>−1</sup> dataset of 13 TeV proton–proton collisions recorded by the ATLAS detector during LHC Run 2. Leptonic decays of the Z boson and hadronic decays of the light resonance are considered. The resonance can be interpreted as a J/ψ or η<inf>c</inf> meson, an axion-like particle, or a light pseudoscalar predicted in two-Higgs-doublet models. Due to its low mass, this resonance is produced with a high Lorentz boost in the laboratory frame and therefore reconstructed as a single small-radius jet of hadrons. A neural network is used to correct the Monte Carlo simulation of the total expected background using data from sideband regions. Two additional neural networks are used to distinguish signal from background, enhancing the purity of the signal region. A binned profile-likelihood fit is performed on the final-state invariant mass distribution. No significant excess of events relative to the expected background is observed, and upper limits at 95% confidence level are set on the Higgs boson's branching fraction to a Z boson and a light resonance. The exclusion limit is ∼10% for the lower masses, and increases for higher masses. Upper limits on the effective coupling C<inf>ZH</inf> <sup>eff</sup>/Λ of an axion-like particle to a Higgs boson and Z boson are also set at 95% confidence level, and range from 0.9 to 2 TeV<sup>−1</sup>.
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Journal articleZwalinski L, Zou W, Zormpa O, et al., 2025,
A precise measurement of the jet energy scale derived from single-particle measurements and in situ techniques in proton–proton collisions at s= 13 TeV with the ATLAS detector
, European Physical Journal C, Vol: 85, ISSN: 1434-6044The jet energy calibration and its uncertainties are derived from measurements of the calorimeter response to single particles in both data and Monte Carlo simulation using proton–proton collisions at s=13 TeV collected with the ATLAS detector during Run 2 at the Large Hadron Collider. The jet calibration uncertainty for anti-kT jets with a jet radius parameter of Rjet=0.4 and in the central jet rapidity region is about 2.5% for transverse momenta (pT) of 20 GeV, about 0.5% for pT=300 GeV and 0.7% for pT=4 TeV. Excellent agreement is found with earlier determinations obtained from pT-balance based in situ methods (Z/γ+jets). The combination of these two independent methods results in the most precise jet energy measurement achieved so far with the ATLAS detector with a relative uncertainty of 0.3% at pT=300 GeV and 0.6% at 4 TeV. The jet energy calibration is also derived with the single-particle calorimeter response measurements separately for quark- and gluon-induced jets and furthermore for jets with Rjet varying from 0.2 to 1.0 retaining the correlations between these measurements. Differences between inclusive jets and jets from boosted top-quark decays, with and without grooming the soft jet constituents, are also studied.
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Journal articleKleykamp J, Akhter S, Dar ZA, et al., 2025,
Measurement of the A dependence of the νμ charged-current quasielasticlike cross section as a function of muon and proton kinematics at (Eν) ∼ 6 GeV
, PHYSICAL REVIEW D, Vol: 112, ISSN: 2470-0010 -
Journal articleAad G, Aakvaag E, Abbott B, et al., 2025,
Measurement of jet track functions in pp collisions at s=13 TeV with the ATLAS detector
, Physics Letters Section B Nuclear Elementary Particle and High Energy Physics, Vol: 868, ISSN: 0370-2693Measurements 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<inf>q</inf> carried by charged hadrons from a fragmenting quark or gluon. This letter presents a direct measurement of r<inf>q</inf> distributions in dijet events from the 140 fb<sup>−1</sup> of proton–proton collisions at s=13 TeV recorded with the ATLAS detector. The data are corrected for detector effects using machine-learning methods. The scale evolution of the moments of the r<inf>q</inf> distribution is sensitive to non-linear renormalization group evolution equations of QCD, and is compared with analytic predictions. When incorporated into future theoretical calculations, these results will enable a precision program of theory-data comparison for track-based jet substructure observables.
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Journal articleHayrapetyan A, Tumasyan A, Adam W, et al., 2025,
Measurement of the W boson decay branching fraction ratio B(W → cq)/B(W → q(q)over-bar′) in proton-proton collisions at <i>√</i>s=13TeV
, PHYSICS LETTERS B, Vol: 868, ISSN: 0370-2693 -
Journal articleAbbaslu S, Abud AA, Acciarri R, et al., 2025,
Spatial and temporal evaluations of the liquid argon purity in ProtoDUNE-SP
, JOURNAL OF INSTRUMENTATION, Vol: 20- Cite
- Citations: 1
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Journal articleChekhovsky V, Hayrapetyan A, Makarenko V, et al., 2025,
Determination of the strong coupling and its running from measurements of inclusive jet production
, PHYSICS LETTERS B, Vol: 868, ISSN: 0370-2693- Cite
- Citations: 1
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Journal articleHayrapetyan A, Tumasyan A, Adam W, et al., 2025,
Multiplicity dependence of charm baryon and charm meson production in pPb collisions at √S<sub>NN</sub>=8.16 TeV
, PHYSICS LETTERS B, Vol: 868, ISSN: 0370-2693 -
Journal articleHayrapetyan A, Tumasyan A, Adam W, et al., 2025,
Elliptic anisotropy measurement of the f<sub>0</sub>(980) hadron in proton-lead collisions and evidence for its quark-antiquark composition
, NATURE COMMUNICATIONS, Vol: 16 -
Journal articleAad G, Aakvaag E, Abbott B, et al., 2025,
Azimuthal anisotropies of charged particles with high transverse momentum in Pb plus Pb collisions at √<i>s</i><sub>NN</sub>=5.02 TeV with the ATLAS detector
, PHYSICAL REVIEW C, Vol: 112, ISSN: 2469-9985 -
Journal articleMckean J, Gonzalez-Jimenez R, Kabirnezhad M, et al., 2025,
Implementation of a relativistic distorted wave impulse approximation model into the NEUT event generator
, PHYSICAL REVIEW D, Vol: 112, ISSN: 2470-0010 -
Journal articleHayrapetyan A, Makarenko V, Tumasyan A, et al., 2025,
Measurement of <i>WWZ</i> and <i>ZH</i> Production Cross Sections at √<i>s</i>=13 and 13.6 TeV
, PHYSICAL REVIEW LETTERS, Vol: 135, ISSN: 0031-9007 -
Journal articleChekhovsky V, Hayrapetyan A, Makarenko V, et al., 2025,
Observation of the Charged-Particle Multiplicity Dependence of σ<sub>ψ(2S)</sub>/σ<sub>J/ψ</sub> in <i>p</i>-Pb Collisions at 8.16 TeV
, PHYSICAL REVIEW LETTERS, Vol: 135, ISSN: 0031-9007 -
Journal articleAbratenko P, Aldana DA, Arellano L, et al., 2025,
Search for an Anomalous Production of Charged-Current ν<sub><i>e</i></sub> Interactions without Visible Pions across Multiple Kinematic Observables in MicroBooNE
, PHYSICAL REVIEW LETTERS, Vol: 135, ISSN: 0031-9007 -
Journal articleAaij R, Abdelmotteleb ASW, Abellan Beteta C, et al., 2025,
Three-pion Bose-Einstein correlations measured in proton-proton collisions
, JOURNAL OF HIGH ENERGY PHYSICS -
Journal articleBal A, Curtis E, Magnan A-M, et al., 2025,
Search for additional scalar bosons within the Inert Doublet Model in a final state with two leptons at the FCC-ee
, EUROPEAN PHYSICAL JOURNAL C, Vol: 85, ISSN: 1434-6044 -
Journal articleChekhovsky V, Hayrapetyan A, Makarenko V, et al., 2025,
Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at √s=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS- Cite
- Citations: 1
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Journal articleAad G, Abbott B, Abeling K, et al., 2025,
Measurements of <i>W</i><SUP>+</SUP><i>W</i><SUP>-</SUP> production cross-sections in pp collisions at √<i>s</i>=13 TeV with the ATLAS detector
, JOURNAL OF HIGH ENERGY PHYSICS -
Journal articleHayrapetyan A, Tumasyan A, Adam W, et al., 2025,
Search for flavor-changing neutral current interactions of the top quark mediated by a Higgs boson in proton-proton collisions at 13 TeV
, PHYSICAL REVIEW D, Vol: 112, ISSN: 2470-0010 -
Journal articleElder B, Mentasti G, Pasatembou E, et al., 2025,
Prospects for detecting new dark physics with the next generation of atomic clocks
, Physical Review D, Vol: 112, ISSN: 2470-0010Wide classes of new fundamental physics theories cause apparent variations in particle mass ratios in space and time. In theories that violate the weak equivalence principle (EP), those variations are not uniform across all particles and may be detected with atomic and molecular clock frequency comparisons. In this work we explore the potential to detect those variations with near-future clock comparisons. We begin by searching published clock data for variations in the electron-proton mass ratio. We then undertake a statistical analysis to model the noise in a variety of clock pairs that can be built in the near future according to the current state of the art, determining their sensitivity to various fundamental physics signals. Those signals are then connected to constraints on fundamental physics theories that lead directly or indirectly to an effective EP-violating, including those motivated by dark matter, dark energy, the vacuum energy problem, unification or other open questions of fundamental physics. This work results in projections for tight new bounds on fundamental physics that could be achieved with atomic and molecular clocks within the next few years. Our code for this work is packaged into a forecast tool that translates clock characteristics into bounds on fundamental physics.
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Journal articleChekhovsky V, Hayrapetyan A, Makarenko V, et al., 2025,
Evidence for Similar Collectivity of High Transverse-Momentum Particles in p-Pb and Pb-Pb Collisions
, PHYSICAL REVIEW LETTERS, Vol: 135, ISSN: 0031-9007 -
Journal articleAad G, Aakvaag E, Abbott B, et al., 2025,
Erratum: Software and computing for Run 3 of the ATLAS experiment at the LHC
, EUROPEAN PHYSICAL JOURNAL C, Vol: 85, ISSN: 1434-6044 -
Journal articleChekhovsky V, Hayrapetyan A, Makarenko V, et al., 2025,
Search for dark matter produced in association with one or two top quarks in proton-proton collisions at √s=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS -
Journal articleHayrapetyan A, Tumasyan A, Adam W, et al., 2025,
Search for a Neutral Gauge Boson with Nonuniversal Fermion Couplings in Vector Boson Fusion Processes in Proton-Proton Collisions at √<i>s</i>=13 TeV
, PHYSICAL REVIEW LETTERS, Vol: 135, ISSN: 0031-9007- Cite
- Citations: 5
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Journal articleAbe K, Abe S, Akutsu R, et al., 2025,
First measurement of neutron capture multiplicity in neutrino-oxygen neutral-current quasielasticlike interactions using an accelerator neutrino beam
, PHYSICAL REVIEW D, Vol: 112, ISSN: 2470-0010- Cite
- Citations: 1
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Journal articleAbratenko P, Aldana DA, Arellano L, et al., 2025,
First Measurement of ν<i><sub>e</sub></i> and (ν)over-bar<i><sub>e</sub></i> Charged-Current Single Charged-Pion Production Differential Cross Sections on Argon Using the MicroBooNE Detector
, PHYSICAL REVIEW LETTERS, Vol: 135, ISSN: 0031-9007- Cite
- Citations: 2
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Journal articleHayrapetyan A, Tumasyan A, Adam W, et al., 2025,
Measurement of light-by-light scattering and the Breit-Wheeler process, and search for axion-like particles in ultraperipheral PbPb collisions at √<i>s</i><sub>NN</sub>=5.02 TeV
, JOURNAL OF HIGH ENERGY PHYSICS
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