Alexander Lincoln Read

"Radiation hard 3D silicon pixel sensors for use in the ATLAS detector at the HL-LHC", A.L. Heggelund et al. (14 authors), 2022 JINST 17 P08003.

"Measurement of Higgs boson production in the diphoton decay channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector", G. Aad et al. [ATLAS Collaboration], arXiv:1408.7084, Phys.Rev. D90 (2014) 11, 112015.

"ATLAS grid workload on NDGF resources: Analysis, modeling, and workload generation", Dmytro Karpenko, Roman Vitenberg, Alexander L. Read,Future Generation Computer Systems, Volume 47, June 2015, Pages 31-47, ISSN 0167-739X.

"The discovery and measurements of a Higgs boson", A. L. Read, 2013 Phys. Scr. 2013 014009.

“A particle consistent with the Higgs Boson observed with the ATLAS Detector at the Large Hadron Collider”
G. Aad et al. [ATLAS Collaboration]. 10.1126/science.1232005 Science 338, 1576 (2012).

“Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC”, G. Aad et al. [ATLAS Collaboration], arXiv:1207.7214 [hep-ex], 10.1016/j.physletb.2012.08.020. Phys. Lett. B 716, 1 (2012)

The ATLAS Collaboration, "Limits on the production of the Standard Model Higgs Boson in pp collisions at sqrt(s) =7 TeV with the ATLAS detector", Submitted to EPJC, CERN-PH-EP-2011-076, arXiv:1106.2748v2 [hep-ex]. 

D. Cameron, A. Konstantinov, F. Ould-Saada, K. Pajchel, A. Read, B. Samset and A. Taga, The advanced resource connector for distributed LHC computing,  PoS A CAT08, 046 (2008), Proceedings Of Science.

The DELPHI Collaboration, Final results from DELPHI on the searches for SM and MSSM neutral Higgs bosons, THE EUROPEAN PHYSICAL JOURNAL C - PARTICLES AND FIELDS, 2003, Volume 32, Number 2, 145-183, doi.org/10.1140/epjc/s2003-01394-x.

The LEP Collaborations and The LEP Working Group for Higgs Searches, Search for the Standard Model Higgs boson at LEP, Physics Letters B, 565, 61-75, 2003, DOI: 10.1016/S0370-2693(03)00614-2.

A. L. Read, Presentation of search results: the CLs technique, 2002, J. Phys. G: Nucl. Part. Phys. 28 2693 doi: 10.1088/0954-3899/28/10/313.

A. L. Read, Modified frequentist analysis of search results (the CLs method), CERN-OPEN-2000-205, CERN, Geneva, 1st Workshop on Confidence Limits, CERN, Geneva, Switzerland, 17 - 18 Jan 2000, pp.81-101, http://cdsweb.cern.ch/record/451614. 

S. J. Alvsvaag et al., The small angle tile calorimeter in the DELPHI experiment, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 425, Issues 1-2, 1 April 1999, Pages 106-139, doi.org/10.1016/S0168-9002(98)01401-6.

A. L. Read, Linear interpolation of histograms, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 425, Issues 1-2, 1 April 1999, Pages 357-360, doi.org/10.1016/S0168-9002(98)01347-3.

L. Bugge et al., Absolute in situ energy calibration of luminosity calorimeters in the DELPHI experiment at LEP, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 327, Issues 2-3, 1 April 1993, Pages 296-307, doi:10.1016/0168-9002(93)90695-E. 

W. W. Ash et al., Precise Measurements of the Leptonic Branching Ratios of the Tau Lepton, Phys. Rev. Lett. 55, 20,2118-2121, (1985), doi: 10.1103/PhysRevLett.55.2118.

“A Precise Measurement of the Branching Fraction for the Decay τ →ντ π”, W. T. Ford, N. Qi, A. L. Read, J. G. Smith, T. Camporesi, I. Peruzzi, M. Piccolo and R. B. Hurst et al. 10.1103/PhysRevD.35.408, Phys. Rev. D 35, 408 (1987).

• Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,934 contributors for this article] (2026). Precise measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from √s=13TeVpp collisions with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 86(5). doi: 10.1140/epjc/s10052-026-15311-0. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,925 contributors for this article] (2026). Characterization of nuclear breakup as a function of hard-scattering kinematics using dijets measured by ATLAS in p+Pb collisions. Physics Letters B. ISSN 0370-2693. 877. doi: 10.1016/j.physletb.2026.140440.
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,939 contributors for this article] (2026). Search for a resonance decaying into a scalar particle and a Higgs boson in the final state with two bottom quarks and two photons with 199 fb−1 of data collected at √s=13 and 13.6 TeV with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 877. doi: 10.1016/j.physletb.2026.140425. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,842 contributors for this article] (2026). Search for massive, long-lived particles in events with displaced vertices and displaced muons in pp collisions at √s=13.6 TeV with the ATLAS experiment. Physics Letters B. ISSN 0370-2693. 878. doi: 10.1016/j.physletb.2026.140509. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,939 contributors for this article] (2026). Search for higgsinos in compressed mass spectra using low-momentum tracks in pp collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(6). doi: 10.1007/JHEP06(2026)094. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,859 contributors for this article] (2026). Search for dimuon resonance in the 35 to 75 GeV mass range using 140 fb−1 of 13 TeV pp collisions with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(6). doi: 10.1007/JHEP06(2026)165. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,863 contributors for this article] (2026). Combined effective field theory interpretation of measurements sensitive to quartic gauge boson couplings in pp collisions at √s=13 TeV with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 879. doi: 10.1016/j.physletb.2026.140683. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,934 contributors for this article] (2026). Differential cross-section measurements of coherent production of singly and doubly resonant top-quark in WWbb events with one lepton at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(7). doi: 10.1007/JHEP07(2026)028. Full text in Research Archive
• Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,932 contributors for this article] (2026). Search for emerging jets in pp collisions at √s=13TeV with the ATLAS experiment. European Physical Journal C. ISSN 1434-6044. 86(7). doi: 10.1140/epjc/s10052-026-15693-1. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,860 contributors for this article] (2026). Measurement of the |Vcb| element of the CKM matrix in tt¯ decays with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(7). doi: 10.1007/JHEP07(2026)078. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,860 contributors for this article] (2026). Measurement of the Higgs boson production in association with top quarks in multilepton final states in pp collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(5). doi: 10.1007/JHEP05(2026)183. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,934 contributors for this article] (2026). Measurement of differential t-channel single top (anti)quark production cross-sections at 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(5). doi: 10.1007/JHEP05(2026)174. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,933 contributors for this article] (2026). Search for long-lived particles using displaced vertices of oppositely charged leptons in 140fb−1 of pp collisions at √s=13 TeV with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 878. doi: 10.1016/j.physletb.2026.140497. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,938 contributors for this article] (2026). Study of Higgs boson pair production in the HH→bb‾γγ final state with 308 fb−1 of data collected at √s= 13 TeV and 13.6 TeV by the ATLAS experiment. Physics Letters B. ISSN 0370-2693. 876. doi: 10.1016/j.physletb.2026.140280. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,923 contributors for this article] (2026). Search for Higgs bosons produced in association with a high-energy photon via vector-boson fusion and decaying to a pair of b-quarks in the ATLAS detector. Physics Letters B. ISSN 0370-2693. doi: 10.1016/j.physletb.2026.140279. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,925 contributors for this article] (2026). Measurement of coherent exclusive J/ψ → μ+μ−production in ultraperipheral Pb+Pb collisions at √sNN = 5.36 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(4). doi: 10.1007/JHEP04(2026)020. Full text in Research Archive
• Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,931 contributors for this article] (2026). Search for Beyond the Standard Model physics with anomaly detection in multilepton final states in pp collisions at √s = 13 TeV with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 86(3). doi: 10.1140/epjc/s10052-025-15218-2. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,929 contributors for this article] (2026). Measurement of the top-quark Yukawa coupling from tt production in the lepton+jets final state using pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(1). doi: 10.1007/JHEP01(2026)117. Full text in Research Archive
• Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,929 contributors for this article] (2026). Search for heavy neutral leptons in decays of W bosons produced in 13 TeV pp collisions using prompt signatures in the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 86(2). doi: 10.1140/epjc/s10052-025-15191-w. Full text in Research Archive
• Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,926 contributors for this article] (2026). Transforming jet flavour tagging at ATLAS. Nature Communications. 17(1). doi: 10.1038/s41467-025-65059-6. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,934 contributors for this article] (2026). Observation of tt¯γγ production at √s=13 TeV with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 874. doi: 10.1016/j.physletb.2026.140195. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,911 contributors for this article] (2026). Evidence for the Collective Nature of Radial Flow in Pb+Pb Collisions with the ATLAS Detector. Physical Review Letters. ISSN 0031-9007. 136(3). doi: 10.1103/ldcn-r2lq. Full text in Research Archive
• Zwalinski, L.; Zou, W.; Zormpa, O.; Zorbas, T. G.; Zoch, K. & Zoccoli, A. [Show all 2,908 contributors for this article] (2025). Search for tt¯H/A→tt¯tt¯ production in proton–proton collisions at √s=13 TeV with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(5). doi: 10.1140/epjc/s10052-025-14041-z. Full text in Research Archive
• Zwalinski, L.; Zou, W.; Zormpa, O.; Zorbas, T. G.; Zoch, K. & Zoccoli, A. [Show all 2,919 contributors for this article] (2025). Precision measurement of the B0 meson lifetime using B0→J/ψK∗0 decays with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(7). doi: 10.1140/epjc/s10052-025-14232-8. Full text in Research Archive
• Zwalinski, L.; Zou, W.; Zormpa, O.; Zorbas, T. G.; Zoch, K. & Zoccoli, A. [Show all 2,914 contributors for this article] (2025). A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps. European Physical Journal C. ISSN 1434-6044. 85(11). doi: 10.1140/epjc/s10052-025-14682-0. Full text in Research Archive
• Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,903 contributors for this article] (2025). Search for a new pseudoscalar decaying into a pair of bottom and antibottom quarks in top-associated production in √s=13 TeV proton–proton collisions with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(8). doi: 10.1140/epjc/s10052-025-14507-0. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,887 contributors for this article] (2025). Observation of 𝑉 𝑉 𝑍 production at √𝑠 = 13 TeV with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 866. doi: 10.1016/j.physletb.2025.139527. Full text in Research Archive
• Zwalinski, L.; Zou, W.; Zormpa, O.; Zorbas, T. G.; Zoch, K. & Zoccoli, A. [Show all 2,873 contributors for this article] (2025). Energy scale and resolution for anti-kt jets with radius parameters R=0.2 and 0.6 measured in proton-proton collisions at √s=13 TeV with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(7). doi: 10.1140/epjc/s10052-025-14226-6. Full text in Research Archive
• Zwalinski, L.; Zou, W.; Zormpa, O.; Zorbas, T. G.; Zoch, K. & Zoccoli, A. [Show all 2,918 contributors for this article] (2025). Measurement of W±-boson differential cross-sections in proton–proton collisions with low pile-up data at √s=5.02 TeV and 13TeV with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(7). doi: 10.1140/epjc/s10052-025-14178-x. Full text in Research Archive Show summary

  High precision single-differential W ±-boson pro- duction cross-sections as a function of electron or muon transverse momentum pT or their pseudorapity η, as well as double-differential cross-sections as functions of these vari- ables, are measured in proton–proton collisions at centre-of- mass energies √s = 5.02 TeV and 13 TeV. The W -boson charge asymmetry as a function of lepton η is also measured. The data, collected in dedicated runs at reduced instantaneous luminosity with the ATLAS detector at the Large Hadron Collider, correspond to integrated luminosities of 255 pb−1 at 5.02 TeV and 338 pb−1 at 13 TeV. The measurements are in agreement with Standard-Model predictions calculated at next-to-next-to-leading-order in the strong coupling constant αs including transverse-momentum resummation at next-to- next-to-leading logarithmic accuracy using several parton distribution functions. The impact of the measured differen- tial cross-sections as a function of lepton η on the determina- tion of these functions is studied using a profiling technique.

• Zwalinski, L.; Zou, W.; Zormpa, O.; Zorbas, T. G.; Zoch, K. & Zoccoli, A. [Show all 2,871 contributors for this article] (2025). Improved reconstruction of highly boosted τ-lepton pairs in the ττ→(μνμντ)(hadrons+ντ) decay channels with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(6). doi: 10.1140/epjc/s10052-025-14012-4. Full text in Research Archive
• Zwalinski, L.; Zou, W.; Zormpa, O.; Zorbas, T. G.; Zoch, K. & Zoccoli, A. [Show all 2,926 contributors for this article] (2025). Measurement of the associated production of a top-antitop-quark pair and a Higgs boson decaying into a bb¯ pair in pp collisions at √s=13 TeV using the ATLAS detector at the LHC. European Physical Journal C. ISSN 1434-6044. 85(2). doi: 10.1140/epjc/s10052-025-13740-x. Full text in Research Archive
• Zwalinski, L.; Zou, W.; Zormpa, O.; Zorbas, T. G.; Zoch, K. & Zoccoli, A. [Show all 2,921 contributors for this article] (2025). Reconstruction and identification of pairs of collimated τ-leptons decaying hadronically using √s=13 TeV pp collision data with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(5). doi: 10.1140/epjc/s10052-025-14075-3. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,915 contributors for this article] (2025). Probing the Higgs boson CP properties in vector-boson fusion production in the H → τ+τ− channel with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(10). doi: 10.1007/JHEP10(2025)092. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,924 contributors for this article] (2025). Measurements and interpretations of W±Z production cross-sections in pp collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(11). doi: 10.1007/JHEP11(2025)006. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,867 contributors for this article] (2025). An implementation of neural simulation-based inference for parameter estimation in ATLAS. Reports on progress in physics (Print). ISSN 0034-4885. 88(6). doi: 10.1088/1361-6633/add370. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,913 contributors for this article] (2025). Search for emerging jets in pp collisions at √s = 13.6 TeV with the ATLAS experiment. Reports on progress in physics (Print). ISSN 0034-4885. 88(9). doi: 10.1088/1361-6633/adfe17. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,874 contributors for this article] (2025). Configuration, Performance, and Commissioning of the ATLAS b-jet Triggers for the 2022 and 2023 LHC data-taking periods. Journal of Instrumentation (JINST). 20(3). doi: 10.1088/1748-0221/20/03/P03002. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,863 contributors for this article] (2025). Measurement of off-shell Higgs boson production in the H∗ → ZZ → 4ℓ decay channel using a neural simulation-based inference technique in 13 TeV pp collisions with the ATLAS detector. Reports on progress in physics (Print). ISSN 0034-4885. 88(5). doi: 10.1088/1361-6633/adcd9a. Full text in Research Archive
• Aad, G.; Abbott, B.; Abeling, K.; Abicht, N. J.; Abidi, S. H. & Aboulhorma, A. [Show all 2,924 contributors for this article] (2025). Measurements of W+W−production cross-sections in pp collisions at s=13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(8). doi: 10.1007/JHEP08(2025)142. Full text in Research Archive Show summary

  Measurements of W+W− → e±νμ∓ν production cross-sections are presented, providing a test of the predictions of perturbative quantum chromodynamics and the electroweak theory. The measurements are based on data from pp collisions at √s = 13 TeV recorded by the ATLAS detector at the Large Hadron Collider in 2015–2018, corresponding to an integrated luminosity of 140 fb−1. The number of events due to top-quark pair production, the largest background, is reduced by rejecting events containing jets with b-hadron decays. An improved methodology for estimating the remaining top-quark background enables a precise measurement of W+W− cross-sections with no additional requirements on jets. The fiducial W+W− cross-section is determined in a maximum-likelihood fit with an uncertainty of 3.1%. The measurement is extrapolated to the full phase space, resulting in a total W+W− cross-section of 127 ± 4 pb. Differential cross-sections are measured as a function of twelve observables that comprehensively describe the kinematics of W+W− events. The measurements are compared with state-of-the-art theory calculations and excellent agreement with predictions is observed. A charge asymmetry in the lepton rapidity is observed as a function of the dilepton invariant mass, in agreement with the Standard Model expectation. A CP-odd observable is measured to be consistent with no CP violation. Limits on Standard Model effective field theory Wilson coefficients in the Warsaw basis are obtained from the differential cross-sections.

• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,883 contributors for this article] (2025). Measurement of tt¯ production in association with additional b-jets in the eμ final state in proton–proton collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(1). doi: 10.1007/JHEP01(2025)068. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,874 contributors for this article] (2025). Cross-section measurements for the production of a W-boson in association with high-transverse-momentum jets in pp collisions at √s = 13 TeV with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(7). doi: 10.1140/epjc/s10052-025-14078-0. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,909 contributors for this article] (2025). Evidence for Longitudinally Polarized W Bosons in the Electroweak Production of Same-Sign W Boson Pairs in Association with Two Jets in pp Collisions at √s = 13 TeV with the ATLAS Detector. Physical Review Letters. ISSN 0031-9007. 135(11). doi: 10.1103/bpln-ccql. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,946 contributors for this article] (2025). Measurements of the production cross-sections of a Higgs boson in association with a vector boson and decaying into WW∗ with the ATLAS detector at √s = 13 TeV. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(8). doi: 10.1007/JHEP08(2025)034. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,889 contributors for this article] (2025). Differential cross-section measurements of Higgs boson production in the H→τ+τ− decay channel in pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(3). doi: 10.1007/JHEP03(2025)010. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,933 contributors for this article] (2025). Differential cross-section measurements of D± and D±s meson production in proton-proton collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(7). doi: 10.1007/JHEP07(2025)086. Full text in Research Archive
• Aad, G.; Abbott, B.; Abeling, K.; Abicht, N. J.; Abidi, S. H. & Aboulhorma, A. [Show all 2,877 contributors for this article] (2025). Search for diphoton resonances in the 66 to 110 GeV mass range using pp collisions at (Formula presented.) TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(1). doi: 10.1007/JHEP01(2025)053. Full text in Research Archive Show summary

  A search is performed for light, spin-0 bosons decaying into two photons in the 66 to 110 GeV mass range, using 140 fb−1 of proton-proton collisions at √s = 13 TeV produced by the Large Hadron Collider and collected by the ATLAS detector. Multivariate analysis techniques are used to define event categories that improve the sensitivity to new resonances beyond the Standard Model. A model-independent search for a generic spin-0 particle and a model-dependent search for an additional low-mass Higgs boson are performed in the diphoton invariant mass spectrum. No significant excess is observed in either search. Mass-dependent upper limits at the 95% confidence level are set in the model-independent scenario on the fiducial cross-section times branching ratio into two photons in the range of 8 fb to 53 fb. Similarly, in the model-dependent scenario upper limits are set on the total cross-section times branching ratio into two photons as a function of the Higgs boson mass in the range of 19 fb to 102 fb.

• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,898 contributors for this article] (2025). Searches for direct slepton production in the compressed-mass corridor in √s = 13 TeV pp collisions with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(8). doi: 10.1007/JHEP08(2025)053. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,920 contributors for this article] (2025). Measurement of the top quark mass with the ATLAS detector using tt¯ events with a high transverse momentum top quark. Physics Letters B. ISSN 0370-2693. 867. doi: 10.1016/j.physletb.2025.139608. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,830 contributors for this article] (2025). Search for Higgs boson decays into a pair of pseudoscalar particles in the γγτhadτhad final state using pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(3). doi: 10.1007/JHEP03(2025)190. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,914 contributors for this article] (2025). A measurement of the high-mass ττ¯ production cross-section at √s = 13 TeV with the ATLAS detector and constraints on new particles and couplings. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(10). doi: 10.1007/JHEP10(2025)054. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,885 contributors for this article] (2025). Observation of 𝑡⁢ ¯ 𝑡 Production in Pb+Pb Collisions at √𝑠NN=5.02  TeV with the ATLAS Detector. Physical Review Letters. ISSN 0031-9007. 134(14). doi: 10.1103/PhysRevLett.134.142301. Full text in Research Archive
• Aad, G.; Abbott, B.; Abeling, K.; Abicht, N. J.; Abidi, S. H. & Aboulhorma, A. [Show all 2,925 contributors for this article] (2025). Search for a new scalar decaying into new spin-1 bosons in four-lepton final states with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 865. doi: 10.1016/j.physletb.2025.139472. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,942 contributors for this article] (2025). Search for the jet-induced diffusion wake in the quark-gluon plasma via measurements of jet-track correlations in photon-jet events in Pb + Pb collisions at √𝑠𝑁⁢𝑁 = 5.02TeV with the ATLAS detector. Physical Review C. ISSN 2469-9985. 111(4). doi: 10.1103/PhysRevC.111.044909. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,887 contributors for this article] (2025). Search for the associated production of charm quarks and a Higgs boson decaying into a photon pair with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(2). doi: 10.1007/JHEP02(2025)045. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,867 contributors for this article] (2025). Search for charged Higgs bosons produced in top-quark decays or in association with top quarks and decaying via 𝐻± →𝜏±⁢𝜈𝜏 in 13 TeV 𝑝⁢𝑝 collisions with the ATLAS detector. Physical Review D. ISSN 2470-0010. 111(7). doi: 10.1103/PhysRevD.111.072006. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,922 contributors for this article] (2025). Search for the production of a Higgs boson in association with a single top quark in pp collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(10). doi: 10.1007/JHEP10(2025)093. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,876 contributors for this article] (2025). Search for boosted low-mass resonances decaying into hadrons produced in association with a photon in pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(1). doi: 10.1007/JHEP01(2025)099. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,927 contributors for this article] (2025). Measurement of jet track functions in pp collisions at √s=13 TeV with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 868. doi: 10.1016/j.physletb.2025.139680. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,826 contributors for this article] (2025). Search for a heavy charged Higgs boson decaying into a W boson and a Higgs boson in final states with leptons and b-jets in √s = 13 TeV pp collisions with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(2). doi: 10.1007/JHEP02(2025)143. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,882 contributors for this article] (2025). Search for vector-like leptons coupling to first- and second-generation Standard Model leptons in pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(5). doi: 10.1007/JHEP05(2025)075. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,920 contributors for this article] (2025). Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(5). doi: 10.1007/JHEP05(2025)038. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,876 contributors for this article] (2025). Search for same-charge top-quark pair production in pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(2). doi: 10.1007/JHEP02(2025)084. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abeling, K.; Abicht, N. J. & Abidi, S. H. [Show all 2,880 contributors for this article] (2025). The performance of missing transverse momentum reconstruction and its significance with the ATLAS detector using 140 fb-1 of √s=13 TeV pp collisions. European Physical Journal C. ISSN 1434-6044. 85(6). doi: 10.1140/epjc/s10052-025-14062-8. Full text in Research Archive
• Zwalinski, L.; Zou, W.; Zormpa, O.; Zorbas, T. G.; Zoch, K. & Zoccoli, A. [Show all 2,903 contributors for this article] (2025). Total Cost of Ownership and Evaluation of Google Cloud Resources for the ATLAS Experiment at the LHC. Computing and Software for Big Science. ISSN 2510-2036. 9(1). doi: 10.1007/s41781-024-00128-x. Full text in Research Archive Show summary

  The ATLAS Google Project was established as part of an ongoing evaluation of the use of commercial clouds by the ATLAS Collaboration, in anticipation of the potential future adoption of such resources by WLCG grid sites to fulfil or complement their computing pledges. Seamless integration of Google cloud resources into the worldwide ATLAS distributed computing infrastructure was achieved at large scale and for an extended period of time, and hence cloud resources are shown to be an effective mechanism to provide additional, flexible computing capacity to ATLAS. For the first time a total cost of ownership analysis has been performed, to identify the dominant cost drivers and explore effective mechanisms for cost control. Network usage significantly impacts the costs of certain ATLAS workflows, underscoring the importance of implementing such mechanisms. Resource bursting has been successfully demonstrated, whilst exposing the true cost of this type of activity. A follow-up to the project is underway to investigate methods for improving the integration of cloud resources in data-intensive distributed computing environments and reducing costs related to network connectivity, which represents the primary expense when extensively utilising cloud resources.

• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,923 contributors for this article] (2025). A search for dark matter produced in association with a dark Higgs boson decaying into a Higgs boson pair in 3b or 4b final states using pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(9). doi: 10.1007/JHEP09(2025)067. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,901 contributors for this article] (2025). Search for heavy neutral leptons in decays of W bosons using leptonic and semi-leptonic displaced vertices in √s = 13 TeV pp collisions with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(7). doi: 10.1007/JHEP07(2025)196. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,905 contributors for this article] (2025). Measurement of double-differential charged-current Drell-Yan cross-sections at high transverse masses in pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(7). doi: 10.1007/JHEP07(2025)026. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,892 contributors for this article] (2025). Measurements of WH and ZH production with Higgs boson decays into bottom quarks and direct constraints on the charm Yukawa coupling in 13 TeV pp collisions with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(4). doi: 10.1007/JHEP04(2025)075. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,903 contributors for this article] (2025). Search for long-lived charged particles using large specific ionisation loss and time of flight in 140 fb−1 of pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(7). doi: 10.1007/JHEP07(2025)140. Full text in Research Archive
• Zwalinski, L.; Zou, W.; Zormpa, O.; Zorbas, T. G.; Zoch, K. & Zoccoli, A. [Show all 2,925 contributors for this article] (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. ISSN 1434-6044. 85(9). doi: 10.1140/epjc/s10052-025-14409-1. Full text in Research Archive
• Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,902 contributors for this article] (2025). Search for electroweak production of vector-like leptons in τ-lepton and b-jet final states in pp collisions at √s = 13 TeV with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(11). doi: 10.1140/epjc/s10052-025-14748-z. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,931 contributors for this article] (2025). Evidence for the Dimuon Decay of the Higgs Boson in 𝑝⁢𝑝 Collisions with the ATLAS Detector. Physical Review Letters. ISSN 0031-9007. 135(23). doi: 10.1103/gzdh-p159. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,916 contributors for this article] (2025). Observation of double parton scattering in same-sign W boson pair production in pp collisions at s=13 TeV with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 870. doi: 10.1016/j.physletb.2025.139892. Full text in Research Archive Show summary

  This letter reports the measurement of double parton scattering in same-sign W boson pair production with the ATLAS detector. The data set used corresponds to an integrated luminosity of 140 fb−1 of proton–proton collisions at a center-of-mass energy of 13 TeV, collected during Run 2 of the Large Hadron Collider. The study is performed in final states including two same-charge leptons, electron or muon, missing transverse momentum, and up to one jet. An excess of events is observed over the expected background contributions with a significance of 8.8 standard deviations. The measured fiducial cross section times leptonic branching fraction is 4.59 ± 0.64 fb. The measurement corresponds to a double parton scattering effective cross section of 10.6 ± 1.8 mb.

• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,909 contributors for this article] (2025). Constraining off-shell Higgs boson production and the Higgs boson total width using WW → ℓνℓν final states with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 870. doi: 10.1016/j.physletb.2025.139898. Full text in Research Archive
• Aad, G.; Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S. & Abeling, K. [Show all 2,924 contributors for this article] (2025). Search for electroweak-scale dijet resonances using trigger-level analysis with the ATLAS detector in 132 fb− 1 of pp collisions at √s = 13 TeV. Physical Review D. ISSN 2470-0010. 112(9). doi: 10.1103/15p2-bkg8. Full text in Research Archive
• Aad, G.; Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S. & Abeling, K. [Show all 2,902 contributors for this article] (2025). Search for events with one displaced vertex from long-lived neutral particles decaying into hadronic jets in the ATLAS muon spectrometer in 𝑝⁢𝑝 collisions at √𝑠 = 13 TeV. Physical Review D. ISSN 2470-0010. 112(9). doi: 10.1103/cmql-s9sq. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,914 contributors for this article] (2025). Measurement of substructure-dependent suppression of large-radius jets with charged particles in Pb+Pb collisions with ATLAS. Physics Letters B. ISSN 0370-2693. 871. doi: 10.1016/j.physletb.2025.139929. Full text in Research Archive
• Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,910 contributors for this article] (2025). Measurements of Higgs boson production via gluon–gluon fusion and vector-boson fusion using H→WW∗→ℓνℓν decays in pp collisions with the ATLAS detector and their effective field theory interpretations. European Physical Journal C. ISSN 1434-6044. 85(12). doi: 10.1140/epjc/s10052-025-14761-2. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 51 contributors for this article] (2025). Search for light neutral particles decaying promptly into collimated pairs of electrons or muons in pp collisions at √s = 13 Te V with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. doi: 10.1140/epjc/s10052-025-13916-5. Full text in Research Archive Show summary

  A search for a dark photon, a new light neutral particle, which decays promptly into collimated pairs of electrons or muons is presented. The search targets dark photons resulting from the exotic decay of the Standard Model Higgs boson, assuming its production via the dominant gluon-gluon fusion mode. The analysis is based on 140 fb - 1 of data collected with the ATLAS detector at the Large Hadron Collider from proton-proton collisions at a center-of-mass energy of 13  Te V . Events with collimated pairs of electrons or muons are analysed and background contributions are estimated using data-driven techniques. No significant excess in the data above the Standard Model background is observed. Upper limits are set at 95% confidence level on the branching ratio of the Higgs boson decay into dark photons between 0.001% and 5%, depending on the assumed dark photon mass and signal model.

• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 50 contributors for this article] (2025). Measurement of the Lund jet plane in hadronic decays of top quarks and W bosons with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85. doi: 10.1140/epjc/s10052-025-13924-5. Full text in Research Archive Show summary

  The Lund jet plane (LJP) is measured for the first time in t t ¯ events, using 140  fb - 1 of s = 13  TeV pp collision data collected with the ATLAS detector at the LHC. The LJP is a two-dimensional observable of the sub-structure of hadronic jets that acts as a proxy for the kinematics of parton showers and hadron formation. The observable is constructed from charged particles and is measured for R = 1.0 anti- k t jets with transverse momentum above 350 GeV containing the full decay products of either a top quark or a daughter W boson. The other top quark in the event is identified from its decay into a b-quark, an electron or a muon and a neutrino. The measurement is corrected for detector effects and compared with a range of Monte Carlo predictions sensitive to different aspects of the hadronic decays of the heavy particles. In the W-boson-initiated jets, all the predictions are incompatible with the measurement. In the top quark initiated jets, disagreement with all predictions is observed in smaller subregions of the plane, and with a subset of the predictions across the fiducial plane. The measurement could be used to improve the tuning of Monte Carlo generators, for better modelling of hadronic decays of heavy quarks and bosons, or to improve the performance of jet taggers.

• Zwalinski, L.; Zou, W.; Zormpa, O.; Zorbas, T. G.; Zoch, K. & Zoccoli, A. [Show all 2,911 contributors for this article] (2025). Estimation of backgrounds from jets misidentified as τ-leptons using the Universal Fake Factor method with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(12). doi: 10.1140/epjc/s10052-025-14916-1. Full text in Research Archive
• Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,935 contributors for this article] (2025). Search for squarks and gluinos in pp collisions at √s = 13 TeV and 13.6 TeV in events with τ-leptons, jets and missing transverse momentum using the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(12). doi: 10.1140/epjc/s10052-025-14957-6. Full text in Research Archive
• Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,914 contributors for this article] (2025). Measurement of high-mass tt¯ℓ+ℓ- production and lepton flavour universality-inspired effective field theory interpretations at √s=13 TeV with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(12). doi: 10.1140/epjc/s10052-025-14695-9. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,924 contributors for this article] (2025). Observation of W+W−γ production in pp collisions at √𝑠 = 13 TeV with the ATLAS detector and constraints on anomalous quartic gauge-boson couplings. Physics Letters B. ISSN 0370-2693. 873. doi: 10.1016/j.physletb.2025.140050. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,923 contributors for this article] (2025). Search for displaced leptons in √s=13 TeV and 13.6 TeV pp collisions with the ATLAS detector. Physical Review D. ISSN 2470-0010. 112. doi: 10.1103/w8hh-xf24. Full text in Research Archive Show summary

  A search for leptons displaced from the primary vertex is performed with the ATLAS detector at the Large Hadron Collider. The search includes the full proton-proton collision dataset collected during Run 2 at √𝑠 =13  TeV and a partial dataset collected during Run 3 in 2022–2023 at √𝑠 =13.6  TeV, corresponding to integrated luminosities of 140  fb−1 and 56.3  fb−1, respectively. Final states with displaced electrons or muons are considered, and novel triggers introduced in Run 3 are employed that use large impact parameter tracking to reconstruct displaced tracks with low momentum. In addition, photon reconstruction and multivariate techniques are employed to broaden the sensitivity to channels with large background rates or highly displaced electrons, respectively. The results are consistent with the Standard Model background expectations and are used to set model-independent limits on the production of displaced electrons and muons. The analysis is also interpreted in the context of a gauge-mediated supersymmetry breaking model with pair-produced long-lived sleptons and a dark sector model with pair-produced chargino-like states. The results include 95% confidence level exclusions of selectrons with lifetimes from 4 ps to 60 ns and a mass of 150 GeV, and exclusions of selectrons, smuons, and staus with a lifetime of 0.3 ns for masses up to 740, 830, and 440 GeV, respectively. Dark charginos with masses up to 380 GeV are excluded for a mass difference with the neutral state of 40 GeV, and mass differences down to 17 GeV are excluded for dark charginos with a 100 GeV mass.

• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,935 contributors for this article] (2025). Search for resonant leptoquark production via lepton-jet signatures in pp collisions at s=13 TeV and s=13.6 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(12). doi: 10.1007/JHEP12(2025)180. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,867 contributors for this article] (2025). Search for supersymmetry in final states with missing transverse momentum and charm-tagged jets using 139 fb−1 of proton-proton collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(2). doi: 10.1007/JHEP02(2025)193. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,914 contributors for this article] (2025). Search for decays of the Higgs boson into scalar particles decaying into four or six b quarks using pp collisions at (Formula presented) = 13 TeV with the ATLAS detector. Physical Review D. ISSN 2470-0010. 112(7). doi: 10.1103/mzld-ldlt. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,935 contributors for this article] (2025). Measurement of the top-quark pole mass in dileptonic tt¯ + 1-jet events at s=13 TeV with the ATLAS experiment. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(12). doi: 10.1007/JHEP12(2025)023. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,914 contributors for this article] (2025). Search for single production of vector-like quarks decaying into W (ℓν)b in pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(12). doi: 10.1007/JHEP12(2025)012. Full text in Research Archive
• Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,938 contributors for this article] (2025). The environmental impact, carbon emissions and sustainability of computing in the ATLAS experiment. European Physical Journal C. ISSN 1434-6044. 85(12). doi: 10.1140/epjc/s10052-025-14976-3. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,889 contributors for this article] (2025). Search for single-production of vector-like quarks decaying into Wb in the fully hadronic final state in pp collisions at s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(2). doi: 10.1007/JHEP02(2025)075. Full text in Research Archive
• Fewell, M.P.; Gallagher, J.; Grant, C.M.; Green, M.J.; Jackson, P. & Kong, A.X.Y. [Show all 2,826 contributors for this article] (2025). Search for triple Higgs boson production in the 6𝑏 final state using 𝑝𝑝 collisions at √𝑠 =13 TeV with the ATLAS detector. Physical Review D. ISSN 2470-0010. 111(3). doi: 10.1103/PhysRevD.111.032006. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N.J. [Show all 2,919 contributors for this article] (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 B. ISSN 0370-2693. 868. doi: 10.1016/j.physletb.2025.139671. Full text in Research Archive
• Zwalinski, L.; Zou, W.; Zormpa, O.; Zorbas, T.G.; Zoch, K. & Zoccoli, A. [Show all 2,930 contributors for this article] (2025). Search for a light charged Higgs boson in t→H±b decays, with H±→cs, in pp collisions at √s=13TeV with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 85(2). doi: 10.1140/epjc/s10052-024-13715-4. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N.J. [Show all 2,872 contributors for this article] (2025). Measurement of top-quark pair production in association with charm quarks in proton–proton collisions at √𝑠 = 13 TeV with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 860. doi: 10.1016/j.physletb.2024.139177. Full text in Research Archive
• Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N.J. [Show all 2,884 contributors for this article] (2025). Combination of searches for singly and doubly charged Higgs bosons produced via vector-boson fusion in proton–proton collisions at s=13 TeV with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 860. doi: 10.1016/j.physletb.2024.139137. Full text in Research Archive

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• Aad, G.; Abbott, B.; Abbott, D. C.; Abeling, K.; Abidi, S. H. & Aboulhorma, A. [Show all 2,906 contributors for this article] (2025). Erratum: Search for boosted diphoton resonances in the 10 to 70 GeV mass range using 138 fb−1 of 13 TeV pp collisions with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2025(12). doi: 10.1007/JHEP12(2025)143. Full text in Research Archive
• Chavez, Daniel; Read, Alexander Lincoln & Shope, David Richard (2026). Multinodal Neural Networks in the Search for Di-Higgs Decays to a $\gamma\gamma$ + Multilepton Final State with the ATLAS Experiment. Universitetet i Oslo. Full text in Research Archive Show summary

  This thesis investigates the use of a physically motivated Transformer-based multinodal neural network for signal--background separation in the $1\ell0\tau_{\mathrm{had}}$ sub-channel of the $\gamma\gamma+\mathrm{ML}$ final state in di-Higgs analyses using ATLAS Run 2 data from the Large Hadron Collider. The performance of several multinodal network structures is compared to that of a standard flat feed-forward neural network using the Asimov expected significance in order to study the direct impact of the Transformer-based multinodal architecture. No improvement in expected significance was found from the multinodal architecture relative to the corresponding flat feed-forward neural network. The analysis did, however, identify an important issue related to neural-network-induced mass sculpting. When the networks were given access to features from which the diphoton invariant mass could be reconstructed, they learned to preferentially select events in the Higgs mass window. This distorted the selected background distribution and made the resulting event selection unsuitable for the significance calculation used in this thesis. All code and configuration files used in this project are available in the project's GitLab repository.

• Opgård, Lars Finstad; Read, Alexander Lincoln & Shope, David Richard (2025). Anvendelse av maskinlæring på søket etter di-Higgs til γγ + multilepton med ATLAS-eksperimentet. Universitetet i Oslo. Full text in Research Archive Show summary

  I denne oppgaven implementerte jeg neural networks (NN) i jakten på å forbedre signaldiskrimineringen over de boosted decision trees (BDT) brukt i ATLAS "Run 2 non-resonant søk etter di-Higgs-decay til γγ + multilepton (γγ + ML)" ved Large Hadron Collider (LHC). Siden jeg ikke implementerte systematiske usikkerheter i denne analysen, reproduserte jeg Run 2 BDT for en mer direkte sammenligning. Denne analysen brukte Monte-Carlo genererte samples basert på Run 2-data for å trene NN-ene og BDT-ene. I motsetning til Run 2-analysen definerte jeg signal- og kontrollregioner for alle underkanalene. Implementeringen av NN-ene inkluderte to metoder, binær og multiklasseklassifisering. Anvendelsen av binær klassifisering ligner mer på BDT. For multiklasseklassifiseringen delte jeg bakgrunnsklassen i to: enkelt Higgs og kontinuum bakgrunn. Dette gir NN-ene muligheten til å skille mellom prosessene på flere måter og forbedre signal sensitiviteten. Analysen viste at NN presterte bedre enn BDT i de fleste underkanalene og kombinasjonen. Multiklasseklassifikatoren presterte bedre enn den binære klassifikatoren for forventet signifikans, mens den binære klassifikatoren var bedre enn multiklasseklassifikatoren angående konfidensgrensene.

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