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ATLAS Notes

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2021-12-06
14:22
Top EFT summary plots December 2021
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-2021-043. - 2021.
Original Communication (restricted to ATLAS) - Full text

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2021-12-06
14:13
Studies of $t\bar{t}/tW$ interference effects in $b\bar{b}\ell^{+}\ell^{-'}\nu\bar{\nu}'$ final states with Powheg and MG5_aMC@NLO setups
The precise simulation of $t\bar{t}$ processes is crucial for precision tests of the Standard Model and in the search for new physics at the Large Hadron Collider. [...]
ATL-PHYS-PUB-2021-042. - 2021.
Original Communication (restricted to ATLAS) - Full text

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2021-12-03
10:03
Micromegas sectors for the ATLAS Muon Upgrade, towards the installation of the New Small Wheel in 2021 / Martinelli, Luca (Sapienza Universita e INFN, Roma I (IT))
The ATLAS experiment is currently upgrading the firstmuon station in the high-rapidity region with the construction of new detector structures, named New Small Wheels (NSW), based on large-size multi-gap resistive stripsMicromegas technology and small-strip Thin Gap Chambers (sTGC). [...]
ATL-MUON-PROC-2021-017. - 2021. - 5 p.
Original Communication (restricted to ATLAS) - Full text

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2021-11-30
17:54
Upgraded data readout and transmission electronics for the Resistive Plate Chambers of the ATLAS Muon Trigger System for the High Luminosity LHC / Morodei, Federico (Sapienza Universita e INFN, Roma I (IT)) ; Corradi, Massimo (Sapienza Universita e INFN, Roma I (IT)) ; Gkountoumis, Panagiotis (CERN) ; Kyriakis-Bitzaros, Efstathios (University of West Attica (GR)) ; Longarini, Iacopo (Sapienza Universita e INFN, Roma I (IT)) ; Mesolongitis, Ioannis (University of West Attica (GR)) ; Vari, Riccardo (Sapienza Universita e INFN, Roma I (IT)) ; Zachariadou, Katerina (University of West Attica (GR))
The Muon Spectrometer of the ATLAS detector will be significantly modified during the Phase-II upgrade in order to mantain low-momentum trigger thresholds at an acceptable trigger rate also in the increased particle rates, integrated radiation and pile-up of the High Luminosity LHC runs. [...]
ATL-MUON-PROC-2021-016. - 2021. - 4 p.
Original Communication (restricted to ATLAS) - Full text

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2021-11-29
23:01
Top Quarks + X Summary Plots December 2021
This note presents summary plots for cross section measurements performed by ATLAS and CMS within the Top Quarks + X sub-group as of December 2021..
ATL-PHYS-PUB-2021-041. - 2021.
Original Communication (restricted to ATLAS) - Full text

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2021-11-19
18:14
ATLAS experiment educational printables | Presented at EPS-HEP 2021 / Velho, Mariana (CERN) ; Goldfarb, Steven (University of Melbourne (AU)) ; Anthony, Katarina (Universita degli Studi di Udine (IT)) ; Mehlhase, Sascha (Ludwig Maximilians Universitat (DE)) ; Gonzalez Suarez, Rebeca (Uppsala University (SE)) ; Nellist, Clara (Nikhef National institute for subatomic physics (NL)) ; Le Boulicaut, Elise Maria (Duke University (US)) ; Rodriguez Vera, Ana Maria (York University (CA))
Five years after launching the first ATLAS colouring book, the ATLAS experiment had a growth on the creation of educational printables: from fact sheets to cheat sheets and activity sheets. [...]
ATL-OREACH-PROC-2021-002. - 2021. - 5 p.
Original Communication (restricted to ATLAS) - Full text

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2021-11-18
15:42
Towards tuning electromagnetic shower properties to data with AtlFast3
A precise simulation of electromagnetic shower properties in the ATLAS calorimeter is crucial for the identification of particle showers originating from electrons and photons. [...]
ATL-SOFT-PUB-2021-004. - 2021.
Original Communication (restricted to ATLAS) - Full text

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2021-11-17
17:03
LFV searches by ATLAS and CMS experiments / Fiorini, Luca (Univ. of Valencia and CSIC (ES))
The appearance of lepton-flavour-violating processes in LHC proton-proton collisions is one of the possible way that new physics beyond the Standard Model could manifest itself. [...]
ATL-PHYS-PROC-2021-105. - 2021.
Original Communication (restricted to ATLAS) - Full text

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2021-11-17
15:15
Study of tracking and software performance of the ATLAS Inner Tracker in staged-installation scenarios at the High-luminosity LHC
The current baseline construction schedule of the Pixel detector of the ATLAS Phase-2 Inner Tracker (ITk) is in tension with its foreseen installation date during Long Shutdown (LS) 3. [...]
ATL-PHYS-PUB-2021-040. - 2021.
Original Communication (restricted to ATLAS) - Full text

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2021-11-16
14:43
A High-Granularity Timing Detector for the ATLAS Phase-II upgrade / Casado Lechuga, Pilar (The Barcelona Institute of Science and Technology (BIST) (ES))
The increase of the particle flux (pile-up) at the HL-LHC with instantaneous luminosities up to L = 7.5 $\times$ 10 $^{34}$ cm $^{-2}$ s $^{-1}$ will have a severe impact on the ATLAS detector reconstruction and trigger performance. [...]
ATL-HGTD-PROC-2021-004. - 2021. - 5 p.
Original Communication (restricted to ATLAS) - Full text

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