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ATLAS PUB Notes

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2025-11-14
17:21
GNN-Based Muon Bucket Filtering for the ATLAS Trigger
The high data rates expected at the High Luminosity Large Hadron Collider (HL-LHC) provide a significant challenge for the trigger system of the ATLAS experiment. [...]
ATL-DAQ-PUB-2025-004. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-11-12
17:03
Preliminary luminosity calibration of the ATLAS 13.6 TeV data recorded in 2024 and combination with the 2022 and 2023 measurements
This note presents a preliminary calibration of the integrated luminosity recorded by the ATLAS experiment in $pp$ collisions at $\sqrt{s}=13.6$ TeV in 2024. [...]
ATL-DAPR-PUB-2025-001. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-11-10
15:16
Preliminary tracking studies involving GPU accelerators for the ATLAS Event Filter at the HL-LHC
The Event Filter (EF) Tracking system allows real-time, online tracking for the ATLAS trigger in the upcoming HL-LHC era. [...]
ATL-DAQ-PUB-2025-003. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-11-09
18:38
Common ATLAS, CMS and LHCb summary plots for Heavy Neutral Leptons (Fall 2025)
Summary plots for Heavy Neutral Leptons. [...]
ATL-PHYS-PUB-2025-048. - 2025 - 5.
Original Communication (restricted to ATLAS) - Full text

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2025-11-08
13:57
Parton-shower and hadronisation modelling uncertainty studies with Herwig7
Uncertainties in the predictions of general-purpose Monte-Carlo event generators, particularly those related to parton showering or hadronisation and other non-perturbative effects, are a leading source of systematic uncertainty in many ATLAS analyses. [...]
ATL-PHYS-PUB-2025-047. - 2025 - 24.
Original Communication (restricted to ATLAS) - Full text

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2025-11-07
18:41
Optimizations of the ATLAS ITk GNN reconstruction pipeline
The HL-LHC upgrade of the ATLAS inner detector (ITk) brings an unprecedented challenge, both in terms of the large number of silicon cluster readouts and the throughput required for budget-constrained track reconstruction. [...]
ATL-PHYS-PUB-2025-046. - 2025 - 26.
Original Communication (restricted to ATLAS) - Full text

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2025-11-07
10:33
Preliminary tracking studies involving FPGA accelerators for the ATLAS Event Filter at the HL-LHC
As part of the ATLAS TDAQ Phase-II upgrade project, the Event Filter Tracking system will allow online tracking for the trigger of the ATLAS experiment in the HL-LHC era. [...]
ATL-DAQ-PUB-2025-002. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-11-03
22:14
Tracking in Dense Environments with Transformers
This work presents a novel application of machine learning to the pattern-recognition stage of charged-particle reconstruction, enabling learned hit-to-track association within dense environments, such as the cores of high-$p_\mathrm{T}$ jets. [...]
ATL-PHYS-PUB-2025-045. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-11-03
21:59
Development of secondary vertex reconstruction using tracks in the ATLAS Muon Spectrometer for long-lived particle decays
Many promising beyond the Standard Model (BSM) theories predict invisible long-lived particles (LLPs) that travel macroscopic distances before decaying into visible Standard Model (SM) particles with a common spatial origin. [...]
ATL-PHYS-PUB-2025-044. - 2025 - Mult..
Original Communication (restricted to ATLAS) - Full text

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2025-10-20
10:23
Summary plots for Axion-like particle models
This note presents summary plots for the 95% confidence level limits on the cross-section times branching ratio for axion-like particles (ALPs), for both prompt and long-lived scenarios. [...]
ATL-PHYS-PUB-2025-043. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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