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A search for an unexpected asymmetry in the production of $e^+ \mu^-$ and $e^- \mu^+$ pairs in proton-proton collisions recorded by the ATLAS detector at $\sqrt s = 13$ TeV / ATLAS Collaboration
This search, a type not previously performed at ATLAS, uses a comparison of the production cross sections for $e^+ \mu^-$ and $e^- \mu^+$ pairs to constrain physics processes beyond the Standard Model. It uses $139 \text{fb}^{-1}$ of proton-proton collision data recorded at $\sqrt{s} = 13$ TeV at the LHC. [...]
arXiv:2112.08090; CERN-EP-2021-190.- Geneva : CERN, 2022-07-10 - 38 p. - Published in : Phys. Lett. B 830 (2022) 137106 Fulltext: 2112.08090 - PDF; Publication - PDF; External link: Previous draft version

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Search for associated production of a $Z$ boson with an invisibly decaying Higgs boson or dark matter candidates at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
A search for invisible decays of the Higgs boson as well as searches for dark matter candidates, produced together with a leptonically decaying $Z$ boson, are presented. The analysis is performed using proton-proton collisions at a centre-of-mass energy of 13 TeV, delivered by the LHC, corresponding to an integrated luminosity of 139 fb$^{-1}$ and recorded by the ATLAS experiment. [...]
arXiv:2111.08372; CERN-EP-2021-204.- Geneva : CERN, 2022-04-04 - 43 p. - Published in : Phys. Lett. B 829 (2022) 137066 Fulltext: 2111.08372 - PDF; Publication - PDF; External link: Previous draft version

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Search for Higgs boson decays into a pair of pseudoscalar particles in the $bb\mu\mu$ final state with the ATLAS detector in $pp$ collisions at $\sqrt{s}=13$ TeV / ATLAS Collaboration
This paper presents a search for decays of the Higgs boson with a mass of 125 GeV into a pair of new pseudoscalar particles, $H\rightarrow aa$, where one $a$-boson decays into a $b$-quark pair and the other into a muon pair. The search uses 139 fb$^{-1}$ of proton-proton collision data at a center-of-mass energy of $\sqrt{s}=13$ TeV recorded between 2015 and 2018 by the ATLAS experiment at the LHC. [...]
arXiv:2110.00313; CERN-EP-2021-157.- Geneva : CERN, 2022-01-01 - 29 p. - Published in : Phys. Rev. D 105 (2022) 012006 Fulltext: PDF; External link: Previous draft version

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Measurement of the $c$-jet mistagging efficiency in $t\bar{t}$ events using $pp$ collision data at $\sqrt{s}=13$ TeV collected with the ATLAS detector / ATLAS Collaboration
A technique is presented to measure the efficiency with which $c$-jets are mistagged as b-jets (mistagging efficiency) using $t\bar{t}$ events, where one of the $W$ bosons decays into an electron or muon and a neutrino and the other decays into a quark-antiquark pair. The measurement utilises the relatively large and known $W\rightarrow cs$ branching ratio, which allows a measurement to be made in an inclusive $c$-jet sample. [...]
arXiv:2109.10627; CERN-EP-2021-166.- Geneva : CERN, 2022-01-31 - 39 p. - Published in : Eur. Phys. J. C 82 (2022) 95 Fulltext: 2109.10627 - PDF; Publication - PDF; External link: Previous draft version

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Operation and performance of the ATLAS semiconductor tracker in LHC Run 2 / ATLAS Collaboration
The semiconductor tracker (SCT) is one of the tracking systems for charged particles in the ATLAS detector. It consists of 4088 silicon strip sensor modules. [...]
arXiv:2109.02591; CERN-EP-2021-178.- Geneva : CERN, 2022-01-10 - 55 p. - Published in : JINST 17 (2022) P01013 Fulltext: Aad_2022_J._Inst._17_P01013 - PDF; document - PDF; 2109.02591 - PDF; External link: Previous draft version

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Search for exotic decays of the Higgs boson into b$ \overline{b} $ and missing transverse momentum in pp collisions at $ \sqrt{s} $ = 13 TeV with the ATLAS detector / ATLAS Collaboration
A search for the exotic decay of the Higgs boson ($H$) into a $b\bar{b}$ resonance plus missing transverse momentum is described. The search is performed with the ATLAS detector at the Large Hadron Collider using 139 $\mathrm{fb}^{-1}$ of $pp$ collisions at $\sqrt{s} = 13$ TeV. [...]
arXiv:2109.02447; CERN-EP-2021-098.- Geneva : CERN, 2022-01-13 - 38 p. - Published in : JHEP 2201 (2022) 063 Fulltext: document - PDF; 2109.02447 - PDF; External link: Previous draft version

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Measurement of the nuclear modification factor for muons from charm and bottom hadrons in Pb+Pb collisions at 5.02 TeV with the ATLAS detector / ATLAS Collaboration
Heavy-flavour hadron production provides information about the transport properties and microscopic structure of the quark- gluon plasma created in ultra-relativistic heavy-ion collisions. A measurement of the muons from semileptonic decays of charm and bottom hadrons produced in Pb+Pb and $pp$ collisions at a nucleon- nucleon centre-of-mass energy of 5.02 TeV with the ATLAS detector at the Large Hadron Collider is presented. [...]
arXiv:2109.00411; CERN-EP-2021-153.- Geneva : CERN, 2022-04-06 - 38 p. - Published in : Phys. Lett. B 829 (2022) 137077 Fulltext: 2109.00411 - PDF; ANA-HION-2019-58-PAPER - PDF; Publication - PDF; External link: Previous draft version

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Measurement of the production cross section of pairs of isolated photons in $pp$ collisions at 13 TeV with the ATLAS detector / ATLAS Collaboration
A measurement of prompt photon-pair production in proton-proton collisions at $\sqrt{s}=13$ TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb$^{-1}$. [...]
arXiv:2107.09330; CERN-EP-2021-105.- Geneva : CERN, 2021-11-22 - 52 p. - Published in : JHEP 2111 (2021) 169 Fulltext: 2107.09330 - PDF; document - PDF; External link: Previous draft version

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Search for new phenomena in three- or four-lepton events in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector / ATLAS Collaboration
A search with minimal model dependence for physics beyond the Standard Model in events featuring three or four leptons ($3\ell$ and $4\ell$, $\ell = e,\mu$) is presented. The analysis aims to be sensitive to a wide range of potential new-physics theories simultaneously. [...]
arXiv:2107.00404; CERN-EP-2021-063.- Geneva : CERN, 2022-01-10 - 40 p. - Published in : Phys. Lett. B 824 (2022) 136832 Fulltext: 2107.00404 - PDF; 1-s2.0-S0370269321007723-main - PDF; External link: Previous draft version

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Search for R-parity-violating supersymmetry in a final state containing leptons and many jets with the ATLAS experiment using $\sqrt{s} = 13\hbox { TeV}$ proton–proton collision data / ATLAS Collaboration
A search for R-parity violating supersymmetry in final states characterised by high jet multiplicity, at least one isolated light lepton and either zero or at least three $b$-tagged jets is presented. The search uses 139 fb$^{-1}$ of $\sqrt{s} = 13$ TeV proton-proton collision data collected by the ATLAS experiment during Run 2 of the Large Hadron Collider. [...]
arXiv:2106.09609; CERN-EP-2021-066.- Geneva : CERN, 2021-11-23 - 39 p. - Published in : Eur. Phys. J. C 81 (2021) 1023 Fulltext: 2106.09609 - PDF; document - PDF; External link: Previous draft version

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