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ATLAS Notes

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2026-01-30
22:46
Searches for Beyond Standard Model particles in final states with leptons in ATLAS / Epari, Shalini (Universite de Montreal (CA))
Many extensions of the Standard Model predict the existence of new leptonic states or particles that decay into final states with high lepton multiplicities [...]
ATL-PHYS-PROC-2026-005. - 2026 - mult..
Original Communication (restricted to ATLAS) - Full text

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2026-01-30
18:35
Carpe Datum: Scaling behavior of transformers for heavy hadron flavor identification
Large language models (LLMs) have demonstrated that scaling, driven by compute, can yield dramatic improvements in performance, with current state-of-the-art systems reaching up to one trillion parameters. [...]
ATL-SOFT-PUB-2026-002. - 2026 - 17.
Original Communication (restricted to ATLAS) - Full text

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2026-01-30
16:45
GN3: Multi-task, Multi-modal Transformers for Jet Flavour Tagging in ATLAS
Identifying jets originating from heavy-flavour quarks is essential for many ATLAS analyses at the Large Hadron Collider. [...]
ATL-PHYS-PUB-2026-001. - 2026 - mult..
Original Communication (restricted to ATLAS) - Full text

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2026-01-29
01:45
Searches for Long-Lived and Unconventional Signatures with the ATLAS Detector / Xu, Zhongyukun (The University of Edinburgh (GB))
The ATLAS experiment has performed a broad programme of searches for long-lived particles (LLPs) using the full Run 2 dataset and the first Run 3 data at √ s = 13.6 T e V . [...]
ATL-PHYS-PROC-2026-004. - 2026 - 7.
Original Communication (restricted to ATLAS) - Full text

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2026-01-26
16:24
Top quark physics (no mass): from Run~2 to the HL-LHC / Melini, Davide (Univ. of Valencia and CSIC (ES))
The top-quark is a fundamental particle of the Standard Model and plays an important role in beyond the Standard Model scenarios. [...]
ATL-PHYS-PROC-2026-003. - 2026 - mult..
Original Communication (restricted to ATLAS) - Full text

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2026-01-26
01:46
Performance of the ATLAS Muon Spectrometer Detectors during Run3 data taking / Wada, Arisa (Nagoya University (JP))
With the conclusion of proton-proton collision data-taking in 2024, the ATLAS experiment has now integrated a luminosity exceeding 180 fb−1 during the Run 3 period, which began in July 2022 following Long Shutdown 2 (LS2). [...]
ATL-MUON-PROC-2026-001. - 2026 - 15.
Original Communication (restricted to ATLAS) - Full text

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2026-01-23
10:31
ATLAS TDAQ Authors list
TDAQ Authors list version 17
ATL-DAQ-PUB-2026-001. - 2026 - 9.
Original Communication (restricted to ATLAS) - Full text

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2026-01-22
15:36
Calibration and performances of the ATLAS Tile calorimeter / D'Anniballe, Gabriele (Universita & INFN Pisa (IT)) ; ATLAS Collaboration
The Tile Calorimeter (TileCal) is a sampling hadronic calorimeter covering the central region of the ATLAS experiment, with steel as absorber and plastic scintillators as active medium. [...]
ATL-TILECAL-PROC-2026-002. - 2026 - 8.
Original Communication (restricted to ATLAS) - Full text

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2026-01-22
12:54
Chasing hints from flavor physics at the energy frontier with the ATLAS detector / Epari, Shalini (Universite de Montreal (CA))
Hints from the flavor sector—such as anomalies in B-meson decays and inconsistencies in CKM unitarity—offer clues about what new physics beyond the Standard Model might look like. [...]
ATL-PHYS-PROC-2026-002. - 2026 - mult..
Original Communication (restricted to ATLAS) - Full text

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2026-01-19
16:49
ATLAS Computing Acknowledgements
Document listing the centres providing major contributions to ATLAS computing in terms of CPU resources in 2024 and 2025. [...]
ATL-SOFT-PUB-2026-001. - 2026 - 4.
Original Communication (restricted to ATLAS) - Full text

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