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ATLAS Preprints

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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
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. [...]
CERN-EP-2024-315. - 2024
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2024-12-16
18:03
Cross-section measurements for the production of a $W$-boson in association with high-transverse-momentum jets in $pp$ collisions at $\sqrt{s}$= 13 TeV with the ATLAS detector
A set of measurements for the production of a $W$-boson in association with high-transverse-momentum jets is presented using 140 fb$^{-1}$ of proton-proton collision data at a centre-of-mass energy of $\sqrt{s}=13$ TeV collected by the ATLAS detector at the LHC. [...]
CERN-EP-2024-277. - 2024
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2024-12-11
13:59
Transformer Neural Networks in the Measurement of $t\bar{t}H$ Production in the $H\to{}b\bar{b}$ Decay Channel with ATLAS / Scheulen, Chris (Geneva U.)
A measurement of Higgs boson production in association with a top quark pair in the bottom--anti-bottom Higgs boson decay channel and leptonic final states is presented. [...]
arXiv:2412.08387 ; ATL-PHYS-PROC-2024-116. - 2024 - 5.
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2024-12-10
05:15
Measuring the ATLAS ITk Pixel Detector Material via Multiple Scattering of Positrons at the CERN PS / Koch, Simon Florian (Oxford U.) ; Moser, Brian (Oxford U. ; CERN) ; Lindner, Antonín (CERN) ; Dao, Valerio (CERN ; SUNY, Stony Brook) ; Asensi, Ignacio (CERN) ; Bortoletto, Daniela (Oxford U.) ; Brekkum, Marianne (CERN) ; Dachs, Florian (CERN) ; Joos, Hans Ludwig (CERN ; Gottingen U., II. Phys. Inst.) ; van Rijnbach, Milou (CERN ; Oslo U.) et al.
The ITk is a new silicon tracker for the ATLAS experiment designed to increase detector resolution, readout capacity, and radiation hardness, in preparation for the larger number of simultaneous proton-proton interactions at the High Luminosity LHC. [...]
arXiv:2412.04686. - 12.
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2024-12-05
16:08
Precision calibration of calorimeter signals in the ATLAS experiment using an uncertainty-aware neural network / ATLAS Collaboration
The ATLAS experiment at the Large Hadron Collider explores the use of modern neural networks for a multi-dimensional calibration of its calorimeter signal defined by clusters of topologically connected cells (topo-clusters). [...]
arXiv:2412.04370 ; CERN-EP-2024-317. - 2024 - 72.
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2024-12-04
05:09
Heavy-flavor production and hadronization at the LHC: experimental status and perspectives from LHC experiments / Feuillard, Victor (Heidelberg U.)
Heavy-flavor hadrons are one of the most prominent probes to study the quark-gluon plasma and to test models based on Quantum Chromodynamics (QCD). [...]
arXiv:2412.01336. - 7.
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2024-12-02
16:59
An implementation of neural simulation-based inference for parameter estimation in ATLAS / ATLAS Collaboration
Neural simulation-based inference is a powerful class of machine-learning-based methods for statistical inference that naturally handles high-dimensional parameter estimation without the need to bin data into low-dimensional summary histograms. [...]
arXiv:2412.01600 ; CERN-EP-2024-305. - 2024 - 49.
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2024-12-02
16:17
Measurement of off-shell Higgs boson production in the $H^*\rightarrow ZZ\rightarrow 4\ell$ decay channel using a neural simulation-based inference technique in 13 TeV $pp$ collisions with the ATLAS detector / ATLAS Collaboration
A measurement of off-shell Higgs boson production in the $H^*\to ZZ\to 4\ell$ decay channel is presented. [...]
arXiv:2412.01548 ; CERN-EP-2024-298. - 2024 - 65.
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2024-11-29
04:16
Measurements of $t\bar{t}$ in association with charm quarks at 13 TeV with the ATLAS experiment / Zoch, Knut (Harvard U.)
This talk presents the ATLAS Collaboration's first measurement of the inclusive cross-section for top-quark pair production in association with charm quarks. [...]
arXiv:2411.18209. - 7.
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