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ATLAS Conference Notes

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2026-03-25
08:57
Measurements of charged-particle pseudorapidity distributions and mean transverse momenta in O+O and Ne+Ne collisions at $\sqrt{s_{\mathrm{NN}}} = 5.36$ TeV with the ATLAS detector
This note presents measurements of charged particle multiplicities, mean transverse momenta, and charged particle transverse momentum spectra as a function of pseudorapidity in O+O and Ne+Ne collisions at $\sqrt{s_{\mathrm{NN}}}= 5.36$ TeV using data-sets recorded by the ATLAS experiment in 2025. [...]
ATLAS-CONF-2026-004. - 2026 - 37.
Original Communication (restricted to ATLAS) - Full text

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2026-03-23
11:24
Measurements of the Higgs boson production, fiducial and differential cross-sections in the four lepton decay channel using 164 fb$^{-1}$ of data collected at $\sqrt{s}$ = 13.6 TeV with the ATLAS detector
Inclusive, differential and production-mode cross-section measurements of the Higgs boson are performed in the $H \to ZZ^{*} \to 4\ell$ decay channel. [...]
ATLAS-CONF-2026-003. - 2026 - 66.
Original Communication (restricted to ATLAS) - Full text

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2026-03-23
11:19
Search for the associated production of a Higgs boson and a single top quark in the $H \to \tau\tau$ decay mode and combined measurement of $\textit{tH}$ production using $\textit{pp}$ collisions at 13 TeV with the ATLAS detector
A search for the production of a Higgs boson in association with a single top quark in multi-lepton final states including a $\tau$ lepton is presented, using an integrated luminosity of $140\,\text{fb}^{-1}$ of proton-proton collision data at a centre-of-mass energy of $\sqrt{s} = 13\,\text{TeV}$ collected by the ATLAS detector at the LHC. [...]
ATLAS-CONF-2026-002. - 2026 - 37.
Original Communication (restricted to ATLAS) - Full text

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2026-01-13
20:25
Combination of ATLAS and CMS measurements of the azimuthal spin correlation variable in dilepton $t\bar{t}$ events at $\sqrt{s} = 13$ TeV
This document presents a combination of measurements sensitive to $t\bar{t}$ spin correlations. [...]
ATLAS-CONF-2026-001. - 2026 - 27.
Original Communication (restricted to ATLAS) - Full text

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2025-10-30
17:18
Combination of ATLAS and CMS searches for Higgs boson pair production at $\sqrt{s} = 13$ TeV
This note presents a combination of searches for Higgs boson pair (HH) production performed by the ATLAS and CMS Collaborations using proton-proton collision data sets recorded at $\sqrt{s} = 13\,\text{TeV}$ at the LHC Run 2, corresponding to integrated luminosities ranging between 126 and 140$\,\text{fb}^{-1}$. [...]
ATLAS-CONF-2025-012. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-10-08
17:12
Measurement of differential $t$-channel single top (anti)quark production cross-sections at 13 TeV with the ATLAS detector
The production of single top quarks and top antiquarks via the $t$-channel exchange of a virtual $W$ boson is measured in proton--proton collisions at a centre-of-mass energy of 13 TeV at the Large Hadron Collider. [...]
ATLAS-CONF-2025-011. - 2025 - 43.
Original Communication (restricted to ATLAS) - Full text

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2025-09-08
10:23
Measurement of dijet transverse momentum balance in O+O and $pp$ collisions at 5.36 TeV with the ATLAS detector
In July 2025, the LHC delivered oxygen-oxygen (O+O) collisions at 5.36 TeV, and the ATLAS experiment collected 8 nb$^{-1}$ of data. [...]
ATLAS-CONF-2025-010. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-07-09
15:31
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 TeV and √s=13.6 TeV with the ATLAS detector.
A search for the resonant production of a heavy scalar $X$ decaying into a Higgs boson and a lighter scalar $S$, through the process $X \rightarrow S (\rightarrow b \bar{b})H ( \rightarrow \gamma\gamma)$, where the two photons are consistent with the Higgs boson decay, is performed. [...]
ATLAS-CONF-2025-009. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-07-07
16:19
Observation of a cross-section enhancement near the $t\bar{t}$ production threshold in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
A measurement is presented of $t\bar{t}$ production in the invariant-mass region near the pair production threshold, $m_{t\bar{t}} \sim 345\,\mathrm{GeV}$, in final states with two charged leptons and multiple jets. [...]
ATLAS-CONF-2025-008. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-07-07
16:18
Search for the Higgs boson decay to a $Z$ boson and a photon in $pp$ collisions at $\sqrt{s} = 13$ TeV and $13.6$ TeV with the ATLAS detector
A search for the Higgs boson decay to a $Z$ boson and a photon in the $\ell\ell\gamma$ ($\ell = e, \mu$) final state is performed using $pp$ collisions recorded with the ATLAS detector at $\sqrt{s}=13.6$ TeV during 2022--2024, corresponding to an integrated luminosity of 165 fb$^{-1}$. [...]
ATLAS-CONF-2025-007. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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