# ATLAS Preprints

2021-05-03
15:51
 Performance of the ATLAS Level-1 topological trigger in Run 2 / ATLAS Collaboration During LHC Run 2 (2015-2018) the ATLAS Level-1 topological trigger allowed efficient data-taking by the ATLAS experiment at luminosities up to 2.1x10$^{34}$ cm$^{-2}$s$^{-1}$, which exceeds the design value by a factor of two. [...] arXiv:2105.01416 ; CERN-EP-2021-040. - 2021. - 36 p. Fulltext - Previous draft version - Fulltext

2021-04-27
11:19
 Search for dark matter in events with missing transverse momentum and a Higgs boson decaying into two photons in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector / ATLAS Collaboration A search for dark-matter particles in events with large missing transverse momentum and a Higgs boson candidate decaying into two photons is reported. [...] arXiv:2104.13240 ; CERN-EP-2021-012. - 2021. - 49 p. Fulltext - Previous draft version - Fulltext

2021-04-07
13:04
 A search for the decays of stopped long-lived particles at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration A search for long-lived particles, which have come to rest within the ATLAS detector, is presented. [...] arXiv:2104.03050 ; CERN-EP-2021-041. - 2021. - 48 p. Fulltext - Previous draft version - Fulltext

2021-04-01
04:35
 Measuring standard model parameters using top-quark cross sections in ATLAS and CMS / Defranchis, Matteo M. (CERN) /ATLAS Collaboration ; CMS Collaboration Theoretical predictions of top-quark cross sections depend on the values of the parameters of the quantum chromodynamics Lagrangian, such as the strong coupling constant and the mass of the top quark, but also on parameters of the electroweak sector of the standard model and parton distribution functions. Comparisons between state-of-the-art calculations and recent measurements at the ATLAS and CMS experiments at the CERN LHC allow for the precise determination of these parameters. [...] arXiv:2103.16384.- 2021-03-30 - 6 p. Fulltext: PDF; In : 13th International Workshop on Top-Quark Physics, Durham, United Kingdom, 14 - 18 Sep 2020

2021-03-26
04:01
 Latest Studies of the SM Higgs Boson Couplings to Fermions at ATLAS / Liu, Yanlin (Michigan U.) This proceeding presents the latest studies on the Yukawa couplings of the Standard Model Higgs boson with 139 fb$^{-1}$ data collected using the ATLAS detector at a center-of-mass energy of 13 TeV. [...] arXiv:2103.12780. - 5 p. Fulltext

2021-03-23
14:43
 Measurements of the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson at $\sqrt{s} = 13$ TeV with the ATLAS detector Measurements of both the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson ($t\bar{t}Z$) are presented. [...] CERN-EP-2021-011. - 2021. Fulltext - Previous draft version

2021-03-22
10:03
 Search for supersymmetry in events with four or more charged leptons in 139 fb$^{-1}$ of $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector / ATLAS Collaboration A search for supersymmetry in events with four or more charged leptons (electrons, muons and $\tau$-leptons) is presented [...] arXiv:2103.11684 ; CERN-EP-2021-021. - 2021. - 53 p. Fulltext - Previous draft version - Fulltext

2021-03-18
16:09
 Measurements of $W^+W^-+\ge 1$ jet production cross-sections in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration Fiducial and differential measurements of $W^+W^-$ production in events with at least one hadronic jet are presented. [...] arXiv:2103.10319 ; CERN-EP-2021-030. - 2021. - 58 p. Fulltext - Previous draft version - Fulltext

2021-03-18
16:00
 Evidence for Higgs boson decays to a low-mass dilepton system and a photon in pp collisions at $\sqrt{s} =$ 13 TeV with the ATLAS detector / ATLAS Collaboration A search for the Higgs boson decaying into a photon and a pair of electrons or muons with an invariant mass $m_{\ell\ell} < 30$ GeV is presented. [...] arXiv:2103.10322 ; CERN-EP-2021-035. - 2021. - 39 p. Fulltext - Previous draft version - Fulltext

2021-03-16
06:31
 Search for bottom-squark pair production in $pp$ collision events at $\sqrt{s} = 13$ TeV with hadronically decaying $\tau$-leptons, $b$-jets and missing transverse momentum using the ATLAS detector / ATLAS Collaboration A search for pair production of bottom squarks in events with hadronically decaying $\tau$-leptons, $b$-tagged jets and large missing transverse momentum is presented. [...] arXiv:2103.08189 ; CERN-EP-2020-235. - 2021. - 45 p. Fulltext - Previous draft version - Fulltext