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ATLAS Notes

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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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2025-07-07
16:16
Combined measurements of Higgs boson production and decay at $\sqrt{s} =$ 13 TeV using up to 140 fb$^{-1}$ of data collected by the ATLAS Experiment
This note presents combined measurements of Higgs boson production and decay using up to 140 fb$^{-1}$ of proton-proton collision data collected by the ATLAS experiment at the LHC at $\sqrt{s} = 13$ TeV. [...]
ATLAS-CONF-2025-006. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-07-06
20:44
Summary of constraints on CP-odd contributions to the HVV coupling
A summary of recent ATLAS measurements and their interpretations as constraints on CP-odd contributions to the Higgs boson interaction with vector bosons (HVV) is presented..
ATL-PHYS-PUB-2025-031. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-07-03
10:02
New ATLAS results on H to boson-pair decays / Billingsley, Sully (Southern Methodist University (US))
Understanding the properties of the Higgs boson remains central to testing the Standard Model and probing for new physics. [...]
ATL-PHYS-PROC-2025-043. - 2025 - 6.
Original Communication (restricted to ATLAS) - Full text

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2025-06-28
12:46
Recent highlights of top-quark cross section and mass measurements at the LHC with ATLAS and CMS / Gocke, Benedikt (Technische Universitaet Dortmund (DE))
The large dataset collected with the ATLAS and CMS detectors at the highest proton-proton collision energies provided by the LHC enables precision testing of theoretical predictions using an extensive sample of top-quark events. [...]
ATL-PHYS-PROC-2025-042. - 2025 - 7.
Original Communication (restricted to ATLAS) - Full text

Notice détaillée
2025-06-27
16:26
Vector-like quark summary plot
This note presents a plot summarising latest ATLAS $95\%$ confidence level exclusion lower limits on the vector-like quark mass for various assumptions on the decay modes. [...]
ATL-PHYS-PUB-2025-030. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

Notice détaillée
2025-06-25
11:42
Explaining the ATLAS GN2 Flavour Tagging Algorithm with Integrated Gradients
Flavour tagging is crucial for many physics analyses at the Large Hadron Collider, enabling the identification of jets originating from heavy-flavour quarks. [...]
ATL-PHYS-PUB-2025-029. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-06-13
11:53
Top EFT Summary Plots May 2025
This note presents figures that summarise the limits on effective field theory (EFT) operators derived from measurements of the ATLAS top working group and LHC Top working group (ATLAS+CMS). [...]
ATL-PHYS-PUB-2025-028. - 2025 - 42.
Original Communication (restricted to ATLAS) - Full text

Notice détaillée
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