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ATLAS Notes

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2026-06-02
19:18
ATLAS New Small Wheel Trigger and Reconstruction Performance Studies with LHC Run-3 data / Chmiel, Kacper (Universita e INFN Roma Tre (IT))
The most important ATLAS upgrade for LHC run-3 has been in the Muon Spectrometer, where the replacement of the two forward inner stations with the New Small Wheels (NSW) introduced two novel detector technologies: the small-strip Thin Gap Chambers (sTGC) and the resistive strips Micromegas (MM). [...]
ATL-MUON-PROC-2026-004. - 2026 - 3.
Original Communication (restricted to ATLAS) - Full text

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2026-06-01
15:12
Top-quark +X Summary Plots - May 2026
This note presents summary plots of cross-section measurements and searches performed by ATLAS andCMS in the Top Quarks +X sector as of May 2026..
ATL-PHYS-PUB-2026-010. - 2026 - 12.
Original Communication (restricted to ATLAS) - Full text

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2026-05-27
18:03
Development and Performance of the Real-Time Muon Reconstruction for the L0 Trigger in HL-LHC ATLAS / Makita, Airu (University of Tokyo (JP))
We will present a detailed performance assessment of the implemented logic and provide an in-depth discussion of the validation strategy and methodology, which has been successfully integrated into our development workflow for the muon reconstruction in the Level-0 (L0) trigger in HL-LHC. [...]
ATL-DAQ-PROC-2026-004. - 2026 - 8.
Original Communication (restricted to ATLAS) - Full text

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2026-05-27
15:25
Implementation of a kinematic fit algorithm in the search for Higgs boson pairs produced at the LHC and detected with ATLAS in the $b\bar{b}\gamma\gamma$ final state / Orlandini, Romano (Universita e INFN Roma Tre (IT))
The observation of Higgs boson pairs is a fundamental step towards understanding the model of spontaneous electroweak symmetry breaking as it represents the most direct method to estimate the cubic term of the Higgs boson potential, responsible for the trilinear self-coupling of the Higgs boson ($\lambda_{3}$). [...]
ATL-PHYS-PROC-2026-026. - 2026 - 11.
Original Communication (restricted to ATLAS) - Full text

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2026-05-27
12:39
Recent Test Beam Results of ATLAS ITk 3D Pixel Modules / ATLAS Collaboration
The ATLAS inner detector will be completely replaced with a new all-silicon tracking system (ITk) during the 2027-2029 shutdown, in order to operate under the demanding conditions of the High-Luminosity LHC. [...]
ATL-ITK-PROC-2026-019. - 2026 - 8.
Original Communication (restricted to ATLAS) - Full text

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2026-05-26
21:07
Top working group cross-section summary plots - May 2026
This note presents updated figures that summarise top cross-section results from the ATLAS top working group and the LHCtopWG
ATL-PHYS-PUB-2026-009. - 2026 - mult..
Original Communication (restricted to ATLAS) - Full text

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2026-05-26
17:30
Top EFT summary plots April 2026
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-2026-008. - 2026 - 52.
Original Communication (restricted to ATLAS) - Full text

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2026-05-26
15:56
Top quark mass and lepton flavor universality summary plots May 2026
This note presents plots summarizing ATLAS, CMS and LHCb results and combinations of top quark mass measurements, in addition to lepton flavor universality inferred from $W$-bosons originating from top-quark decays..
ATL-PHYS-PUB-2026-007. - 2026 - 11.
Original Communication (restricted to ATLAS) - Full text

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2026-05-26
15:50
Current Status of the Phase-2 ATLAS ITk Pixel Detector / Martin, Juliette (University of London (GB))
The upgrade of the LHC to the high luminosity LHC (HL-LHC) by the end of this decade will impose significant challenges on the detectors of the LHC experiments. [...]
ATL-ITK-PROC-2026-018. - 2026 - 8.
Original Communication (restricted to ATLAS) - Full text

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2026-05-26
14:55
Knypaegje: An Algorithm for Achieving Deterministic Startup Phase in GTYe4 and GTYe5 Transceivers / Leguijt, Melvin (Nikhef National institute for subatomic physics (NL))
The FELIX readout system for the ATLAS experiment has been introduced in the LHC Run 3 [...]
ATL-DAQ-PROC-2026-003. - 2026 - 4.
Original Communication (restricted to ATLAS) - Full text

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ATLAS Conference Contributions (6,062)
ATLAS PUB Notes (3,113)
ATLAS Conference Notes (1,283)