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ATLAS Preprints

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2024-12-23
16:05
Energy scale and resolution for anti-$k_t$ jets with radius parameters $R=0.2$ and 0.6 measured in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
Jets with different radius parameters $R$ are an important tool to probe quantum chromodynamics processes at different angular scales. [...]
CERN-EP-2024-339. - 2024
Fulltext - Previous draft version

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2024-12-20
12:22
Azimuthal anisotropies of charged particles with high transverse momentum in Pb+Pb collisions at 5.02 TeV with the ATLAS detector at the LHC
A measurement is presented of elliptic ($v_2$) and triangular ($v_3$) azimuthal anisotropy coefficients for charged particles produced in Pb+Pb collisions at $\sqrt{s_{_\text{NN}}} = 5.02$ TeV using a data set corresponding to an integrated luminosity of $435$ $\mu b^{-1}$ collected with the ATLAS detector at the LHC in 2018. [...]
CERN-EP-2024-334. - 2024
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2024-12-20
12:05
Measurements with top quarks at the LHC / Knolle, Joscha (Gent U.) /ATLAS and CMS Collaborations
The top quark, the heaviest known elementary particle, plays a crucial role in advancing our understanding of fundamental physics. In this contribution, the latest measurements of top quark production and properties from the ATLAS and CMS experiments at the LHC are discussed. [...]
CMS-CR-2024-329.- Geneva : CERN, 2024 - 10 p. Fulltext: PDF;
In : 43rd International Symposium on Physics in Collision, Athens, Gr, 22 - 25 Oct 2024

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2024-12-20
11:48
Differential cross-section measurements of $D^{\pm}$ and $D_{s}^{\pm}$ meson production in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
The production of $D^{\pm}$ and $D_{s}^{\pm}$ charmed mesons is measured using the $D^{\pm}/D_{s}^{\pm} \to \phi(\mu\mu)\pi^{\pm}$ decay channel with 137 fb$^{-1}$ of $\sqrt{s} = 13$ TeV proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider during the years 2016-2018. [...]
CERN-EP-2024-322. - 2024
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2024-12-19
20:20
Observation of $VVZ$ production at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
A search for the production of three massive vector bosons, $VVZ (V=W, Z)$, in proton-proton collisions at $\sqrt{s} = 13$ TeV is performed using data with an integrated luminosity of $140$ fb$^{-1}$ recorded by the ATLAS detector at the Large Hadron Collider. [...]
arXiv:2412.15123 ; CERN-EP-2024-321. - 2024 - 42.
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2024-12-19
20:02
Expected Tracking Performance of the ATLAS Inner Tracker at the High-Luminosity LHC / ATLAS Collaboration
The high-luminosity phase of LHC operations (HL-LHC), will feature a large increase in simultaneous proton-proton interactions per bunch crossing up to 200, compared with a typical leveling target of 64 in Run 3. [...]
arXiv:2412.15090 ; CERN-EP-2024-342. - 2024 - 52 p, 52.
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2024-12-19
16:40
Improved reconstruction of highly boosted $\tau$-lepton pairs in the $\tau\tau\rightarrow(\mu\nu_{\mu}\nu_{\tau})({hadrons}+\nu_{\tau})$ decay channels with the ATLAS detector / ATLAS Collaboration
This paper presents a new $\tau$-lepton reconstruction and identification procedure at the ATLAS detector at the Large Hadron Collider, which leads to significantly improved performance in the case of physics processes where a highly boosted pair of $\tau$-leptons is produced and one $\tau$-lepton decays into a muon and two neutrinos ($\tau_{\mu}$), and the other decays into hadrons and one neutrino ($\tau_{had}$). [...]
arXiv:2412.14937 ; CERN-EP-2024-289. - 2024 - 44 p, 44.
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2024-12-19
09:30
Search for Higgs boson decays into a pair of pseudoscalar particles in the $\gamma\gamma\tau_{\text{had}}\tau_{\text{had}}$ final state using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
A search for exotic decays of the 125 GeV Higgs boson into a pair of new spin-0 particles, $H \to aa$, where one decays into a photon pair and the other into a $\tau$-lepton pair, is presented. [...]
arXiv:2412.14046 ; CERN-EP-2024-323. - 2024 - 37.
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2024-12-17
04:19
ATLAS EFT Results in the Top Quark Sector / Kim, Dongwon (Stockholm U. (main) ; Stockholm U., OKC)
With no direct evidence for new physics at the TeV scale, deviations from the Standard Model (SM) can be explored systematically through Effective Field Theories (EFTs) such as the Standard Model EFT (SMEFT). [...]
arXiv:2412.09911. - 6.
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2024-12-16
19:09
Test of lepton flavour universality in $W$-boson decays into electrons and $\tau$-leptons using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
A measurement of the ratio of the branching fractions, $R_{\tau/e} = B(W \to \tau \nu)/ B(W \to e \nu)$, is performed using a sample of $W$ bosons originating from top-quark decays to final states containing $\tau$-leptons or electrons. [...]
arXiv:2412.11989 ; CERN-EP-2024-315. - 2024 - 50 p, 50.
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