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ATLAS Preprints

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2026-04-27
15:50
Measurement of jet photoproduction in ultra-peripheral Pb+Pb collisions without nuclear breakup at $\sqrt{s_\mathrm{NN}} = 5.02$ TeV with the ATLAS detector
In ultra-relativistic heavy ion collisions at the LHC, each nucleus acts as a source of high-energy quasi-real photons that can participate in scattering processes without causing either participating nucleus to break up and emit forward neutrons. [...]
CERN-EP-2026-125. - 2026
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2026-04-24
07:30
Effective field theory interpretation of ATLAS measurements involving the Higgs boson, electroweak bosons and the top quark / ATLAS Collaboration
Wilson coefficients in dimension-six effective field theory are constrained in a combined fit to several ATLAS measurements. [...]
arXiv:2604.21670 ; CERN-EP-2026-113. - 2026 - 65.
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2026-04-22
16:37
Observation of impact parameter dependent modifications of nuclear parton distributions in photonuclear Pb+Pb collisions at $\sqrt{s_\mathrm{NN}} = 5.02$ TeV with the ATLAS detector / ATLAS Collaboration
High-energy photonuclear ($\gamma+A$) scattering in ultra-peripheral heavy-ion collisions provides a unique probe of nuclear structure. [...]
arXiv:2604.20559 ; CERN-EP-2026-095. - 2026 - 33.
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2026-04-22
11:52
Multiboson and VBS measurements in ATLAS and CMS / Folgueras, Santiago (Oviedo U.) /ATLAS and CMS Collaborations
A review of recent multiboson and vector boson scattering (VBS) measurements from the ATLAS and CMS Collaborations at the LHC is presented. Results are reported from precision diboson cross-section measurements, novel CP-sensitive and polarisation observables in $W\gamma$ production, VBS observations in semileptonic and fully leptonic final states including the first measurements at $\sqrt{s}=13.6\tev$, and observations of triboson processes. [...]
CMS-CR-2026-034.- Geneva : CERN, 2026 - 7 p. Fulltext: PDF;
In : 60th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, It, 15 - 22 Mar 2026

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2026-04-22
11:52
Searches for other exotica / Koraka, Charis Kleio (Wisconsin U., Madison) /ATLAS and CMS Collaborations
A review of recent searches for exotic, beyond the Standard Model (BSM) physics signatures, performed by the ATLAS and CMS Collaborations is presented, covering results shown at the 60th Rencontres de Moriond Electroweak session. The searches discussed target unconventional signatures that go beyond the standard paradigm of high-mass resonances and large missing transverse momentum Heavy Neutral Leptons in W boson decays, exotic Higgs decays to pairs of scalars with unequal masses, Soft Unclustered Energy Patterns (SUEPs) in both hadronic and leptonic channels, s-channel production of lepton-enriched semi-visible jets, and a model-independent anomaly detection search in multi-lepton final states. [...]
CMS-CR-2026-031.- Geneva : CERN, 2026 - 7 p. Fulltext: PDF;
In : 60th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, It, 15 - 22 Mar 2026

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2026-04-22
11:49
Searches for low-mass resonances at ATLAS and CMS / Collard, Caroline (Strasbourg, IPHC) /ATLAS and CMS Collaborations
These proceedings present the latest results on searches for low-mass resonances performed by the ATLAS and CMS collaborations..
CMS-CR-2026-030.- Geneva : CERN, 2026 - 7 p. Fulltext: PDF;
In : 60th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, It, 15 - 22 Mar 2026

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2026-04-22
11:49
Rare top quark production (tt+X) and top quark properties / Sanchez Cruz, Sergio (Oviedo U.) /ATLAS and CMS Collaborations
The production of top quarks is one of the most relevant production modes at the LHC, and allow for precise measurement of the properties of this particle. Top quarks are also produced through rarer mechanisms, including the production of multiple top quarks or the associated production of top quarks with electroweak gauge bosons. [...]
CMS-CR-2026-026.- Geneva : CERN, 2026 - 7 p. Fulltext: PDF;
In : 60th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, It, 15 - 22 Mar 2026

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2026-04-22
04:43
Observation of a cross-section enhancement near the $t\bar{t}$ production threshold in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector / Behr, Janna Katharina (DESY)
A significant excess of $t\bar{t}$ events near the production threshold was observed in LHC Run-2 data by the ATLAS Collaboration. [...]
arXiv:2604.17138. - 4.
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2026-04-22
04:41
Searches for massive, long-lived particles in events with displaced vertices with ATLAS / Rousso, David (DESY)
Many recent efforts at the LHC have been made to search for new particles that do not decay promptly but are instead long-lived. [...]
arXiv:2604.16789 ; ATL-COM-PHYS-2026-161. - 6.
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2026-04-21
17:34
Search for quantum black holes in lepton+jet final states using proton-proton collisions at $\sqrt{s}=13.6$ TeV with the ATLAS detector / ATLAS Collaboration
A search for quantum black holes in electron+jet or muon+jet final states with high invariant mass is performed. [...]
arXiv:2604.19495 ; CERN-EP-2026-053. - 2026 - 36.
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