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1.
Search for flavour-changing neutral-current interactions of a top quark and a gluon in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
A search is presented for the production of a single top quark via left-handed flavour-changing neutral-current (FCNC) interactions of a top quark, a gluon and an up or charm quark. Two production processes are considered: $u+g\rightarrow t$ and $c+g\rightarrow t$. [...]
arXiv:2112.01302; CERN-EP-2021-234.- Geneva : CERN, 2022-04-19 - 51 p. - Published in : Eur. Phys. J. C 82 (2022) 334 Fulltext: 2112.01302 - PDF; document - PDF; External link: Previous draft version
2.
Measurements of azimuthal anisotropies of jet production in Pb+Pb collisions at $\sqrt{s_{NN}} =$ 5.02 TeV with the ATLAS detector / ATLAS Collaboration
The azimuthal variation of jet yields in heavy-ion collisions provides information about the path-length dependence of the energy loss experienced by partons passing through the hot, dense nuclear matter known as the quark-gluon plasma. This paper presents the azimuthal anisotropy coefficients $v_2$, $v_3$, and $v_4$ measured for jets in Pb+Pb collisions at $\sqrt{s_{NN}} =$ 5.02 TeV using the ATLAS detector at the LHC. [...]
arXiv:2111.06606; CERN-EP-2021-218.- Geneva : CERN, 2022-06-07 - 41 p. - Published in : Phys. Rev. C 105 (2022) 064903 Fulltext: PDF; External link: Previous draft version
3.
Search for Higgs bosons decaying into new spin-0 or spin-1 particles in four-lepton final states with the ATLAS detector with 139 fb$^{-1}$ of $pp$ collision data at $\sqrt{s}=13$ TeV / ATLAS Collaboration
Searches are conducted for new spin-0 or spin-1 bosons using events where a Higgs boson with mass $125$ GeV decays into four leptons ($\ell =$ $e$, $\mu$). This decay is presumed to occur via an intermediate state which contains two on-shell, promptly decaying bosons: $H \rightarrow XX/ZX \rightarrow 4\ell$, where the new boson $X$ has a mass between 1 and 60 GeV. [...]
arXiv:2110.13673; CERN-EP-2021-193.- Geneva : CERN, 2022-03-07 - 65 p. - Published in : JHEP 2203 (2022) 041 Fulltext: 2110.13673 - PDF; document - PDF; External link: Previous draft version
4.
Measurement of the energy asymmetry in $t\bar{t}j$ production at 13 TeV with the ATLAS experiment and interpretation in the SMEFT framework / ATLAS Collaboration
A measurement of the energy asymmetry in jet-associated top-quark pair production is presented using 139 $\mathrm{fb}^{-1}$ of data collected by the ATLAS detector at the Large Hadron Collider during $pp$ collisions at $\sqrt{s}=13$ TeV. The observable measures the different probability of top and antitop quarks to have the higher energy as a function of the jet scattering angle with respect to the beam axis. [...]
arXiv:2110.05453; CERN-EP-2021-181.- Geneva : CERN, 2022-04-28 - 52 p. - Published in : Eur. Phys. J. C 82 (2022) 374 Fulltext: 2110.05453 - PDF; Publication - PDF; External link: Previous draft version
5.
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
6.
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
7.
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
8.
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
9.
AtlFast3: the next generation of fast simulation in ATLAS / ATLAS Collaboration
The ATLAS experiment at the Large Hadron Collider has a broad physics programme ranging from precision measurements to direct searches for new particles and new interactions, requiring ever larger and ever more accurate datasets of simulated Monte Carlo events. Detector simulation with GEANT4 is accurate but requires significant CPU resources. [...]
arXiv:2109.02551; CERN-EP-2021-174.- Geneva : CERN, 2022-03-11 - 75 p. - Published in : Comput. Softw. Big Sci. 6 (2022) 7 Fulltext: 2109.02551 - PDF; document - PDF; External link: Previous draft version
10.
Observation of electroweak production of two jets in association with an isolated photon and missing transverse momentum, and search for a Higgs boson decaying into invisible particles at 13 TeV with the ATLAS detector / ATLAS Collaboration
This paper presents the measurement of the electroweak production of two jets in association with a $Z\gamma$ pair with the $Z$ boson decaying into two neutrinos. It also presents the search for invisible or partially invisible decays of a Higgs boson with a mass of 125 GeV produced through vector-boson fusion with a photon in the final state. [...]
arXiv:2109.00925; CERN-EP-2021-137.- Geneva : CERN, 2022-02-03 - 58 p. - Published in : Eur. Phys. J. C 82 (2022) 105 Fulltext: 2109.00925 - PDF; document - PDF; Publication - PDF; External link: Previous draft version

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