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ATLAS Preprints

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2021-06-07
13:56
Configuration and performance of the ATLAS $b$-jet triggers in Run 2 / ATLAS Collaboration
Several improvements to the ATLAS triggers used to identify jets containing $b$-hadrons ($b$-jets) were implemented for data-taking during Run 2 of the Large Hadron Collider from 2016 to 2018. [...]
arXiv:2106.03584 ; CERN-EP-2021-032. - 2021. - 61 p.
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2021-06-07
08:58
Search for chargino-neutralino pair production in final states with three leptons and missing transverse momentum in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS detector / ATLAS Collaboration
A search for chargino-neutralino pair production in three-lepton final states with missing transverse momentum is presented. [...]
arXiv:2106.01676 ; CERN-EP-2021-059. - 2021. - 104 p.
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2021-06-02
06:16
First Steps in Automated Software Development Approach for LHC Phase II Upgrades CO₂ Detector Cooling Systems / Zwalinski, Lukasz (CERN) ; Daguin, Jerome (CERN) ; Davoine, Loic (CERN) ; Frank, Norbert (CERN) ; Giakoumi, Dina (CERN) ; Ostrega, Maciej (CERN) ; Petagna, Paolo (CERN) ; Tropea, Paola (CERN) ; Verlaat, Bart (CERN)
With refrigerating power of the order of 1.5 kW at -35 °C and full compatibility with Detector Control System standards, Light Use Cooling Appliance for Surface Zones (LUCASZ) is the first movable medium size evaporative CO₂ detector cooling system. [...]
2019. - 4 p.

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2021-06-02
06:16
Status of the Process Control Systems Upgrade for the Cryogenic Installations of the LHC Based ATLAS and CMS Detectors / Fluder, Czeslaw (CERN) ; Mastyna, Krzysztof (AGH-UST, Cracow) ; Peksa, Pawel (AGH-UST, Cracow) ; Pezzetti, Marco (CERN) ; Tovar González, Antonio (CERN) ; Wolak, Tomasz (AGH-UST, Cracow)
The ATLAS and CMS cryogenic control systems have been operational for more than a decade. [...]
2019. - 5 p.

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2021-06-02
04:34
The large inner Micromegas modules for the Atlas Muon Spectrometer Upgrade: construction, quality control and characterization / Allard, J. (AIM, Saclay) ; Anfreville, M. (AIM, Saclay) ; Andari, N. (AIM, Saclay) ; Attié, D. (AIM, Saclay) ; Aune, S. (AIM, Saclay) ; Bachacou, H. (AIM, Saclay) ; Balli, F. (AIM, Saclay) ; Bauer, F. (AIM, Saclay) ; Bennet, J. (AIM, Saclay) ; Benoit, T. (AIM, Saclay) et al.
The steadily increasing luminosity of the LHC requires an upgrade with high-rate and high-resolution detector technology for the inner end cap of the ATLAS muon spectrometer: the New Small Wheels (NSW). [...]
arXiv:2105.13709. -
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2021-06-01
04:01
Standard Model QCD with jets and photons at CMS and ATLAS / Kirschenmann, Henning
Recent measurements performed by the ATLAS and CMS collaborations on the Run 2 dataset are testing QCD with unprecedented precision. [...]
arXiv:2105.13749. -
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2021-05-28
13:20
Search for new phenomena in final states with two leptons and one or no $b$-tagged jets at $\sqrt{s} = 13$ TeV using the ATLAS detector / ATLAS Collaboration
A search for new phenomena is presented in final states with two leptons and one or no $b$-tagged jets. [...]
arXiv:2105.13847 ; CERN-EP-2021-065. - 2021. - 32 p.
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2021-05-27
04:06
Impact of the HL-LHC detector upgrades on the physics program of the ATLAS and CMS experiments / Kuehn, Susanne (CERN)
A wealth of physics results have already been obtained from the LHC, due to the excellent performance of the collider and its experiments. [...]
arXiv:2105.11514. - 9 p, 9 p.
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2021-05-27
04:06
$\mathrm{t\bar{t}+X}$ production at ATLAS and CMS / Tonon, Nicolas (DESY)
Recent inclusive and differential cross section measurements of the associated production of top quark pairs with gauge bosons or heavy-flavor jets are reported. [...]
arXiv:2105.05225. - 4 p.
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2021-05-26
14:12
Search for lepton-flavor-violation in $Z$-boson decays with $\tau$-leptons with the ATLAS detector / ATLAS Collaboration
A search for lepton-flavor-violating $Z\rightarrow e\tau$ and $Z\rightarrow\mu\tau$ decays with $pp$ collision data recorded by the ATLAS detector at the LHC is presented. [...]
arXiv:2105.12491 ; CERN-EP-2021-067. - 2021. - 28 p.
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