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ATLAS Preprints

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2025-03-23
09:34
Electroweak diboson production in association with a high-mass dijet system in semileptonic final states from $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
This paper reports the observation of electroweak diboson ($WW/WZ/ZZ$) production in association with a high-mass dijet system, in which final states with one boson decaying leptonically and the other boson decaying hadronically are studied. [...]
CERN-EP-2025-050. - 2025
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2025-03-23
09:23
Search for a new pseudoscalar decaying into a pair of bottom and antibottom quarks in top-associated production in $\sqrt{s}$=13 TeV proton–proton collisions with the ATLAS detector / ATLAS Collaboration
A search for a pseudoscalar $a$ produced in association with a top-quark pair, or in association with a single top quark plus a $W$ boson, with the pseudoscalar decaying into $b$-quarks ($a\rightarrow b\bar{b}$), is performed using the full Run 2 data sample using a dileptonic decay mode signature. [...]
arXiv:2503.17254 ; CERN-EP-2025-060. - 2025 - 52 p, 52.
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2025-03-21
15:40
Searches for direct slepton production in the compressed-mass corridor in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector / ATLAS Collaboration
This paper presents searches for the direct pair production of charged light-flavour sleptons, each decaying into a stable neutralino and an associated Standard Model lepton. [...]
CERN-EP-2025-039 ; arXiv:2503.17186. - 2025 - 66 p, 66.
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2025-03-21
07:49
Search for heavy neutral leptons in decays of W bosons using leptonic and semi-leptonic displaced vertices in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS detector / ATLAS Collaboration
A search is performed for long-lived heavy neutral leptons (HNLs), produced through the decay of a $W$ boson along with a muon or electron. [...]
arXiv:2503.16213 ; CERN-EP-2025-052. - 2025 - 51 p, 51.
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2025-03-17
16:34
Search for cascade decays of charged sleptons and sneutrinos in final states with three leptons and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
A search for cascade decays of charged sleptons and sneutrinos using final states characterized by three leptons (electrons or muons) and missing transverse momentum is presented. [...]
arXiv:2503.13135 ; CERN-EP-2025-045. - 2025 - 60.
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2025-03-14
16:11
Evidence for longitudinally polarized $W$ bosons in the electroweak production of same-sign $W$ boson pairs in association with two jets in pp collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
This Letter reports the first evidence of production of same-sign $W$ boson pairs where at least one of the $W$ bosons is longitudinally polarized and the most stringent constraint to date for the production of two longitudinally polarized same-sign $W$ bosons [...]
arXiv:2503.11317 ; CERN-EP-2025-048. - 2025 - 38.
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2025-03-12
08:25
Charged-hadron and identified-hadron ($K^\mathrm{0}_\mathrm{S}$, $\Lambda$, $\Xi^\mathrm{-}$) yield measurements in photo-nuclear Pb+Pb and $p$+Pb collisions at $\sqrt{s_\mathrm{NN}} = 5.02$ TeV with ATLAS / ATLAS Collaboration
This paper presents the measurement of charged-hadron and identified-hadron ($K^\mathrm{0}_\mathrm{S}$, $\Lambda$, $\Xi^\mathrm{-}$) yields in photo-nuclear collisions using 1.7 $\mathrm{nb^{-1}}$ of $\sqrt{s_\mathrm{NN}} = 5.02$ TeV Pb+Pb data collected in 2018 with the ATLAS detector at the Large Hadron Collider. [...]
arXiv:2503.08181 ; CERN-EP-2025-040. - 2025 - 51.
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2025-03-11
14:07
Precision EW measurements at the LHC / Azzurri, Paolo (INFN, Pisa) /ATLAS, CMS and LHCB Collaborations
A selection of recent results obtained with the LHC data by the ATLAS, CMS, and LHCb experiments in the area of precision electroweak measurements is presented. These results include remarkable new determinations of the W boson mass, the weak mixing angle, and the properties of fermion couplings to gauge bosons. [...]
CMS-CR-2025-032.- Geneva : CERN, 2025 - 10 p. Fulltext: PDF;
In : 35th Rencontres de Blois Particle Physics and Cosmology, Blois, Fr, 20 - 25 Oct 2024

Detaljnije
2025-03-11
14:07
Machine learning in top quark physics at ATLAS and CMS / Komm, Matthias (DESY) /ATLAS and CMS Collaborations
This note presents an overview of machine-learning-based techniques used in the study of the top quark. The research community has developed a diverse set of ideas and tools, including algorithms for the efficient reconstruction of recorded collision events and innovative methods for statistical inference. [...]
CMS-CR-2025-002.- Geneva : CERN, 2025 - 7 p. Fulltext: PDF;
In : 17th International Workshop on Top Quark Physics, Saint Malo, France, 22 - 27 Sep 2024

Detaljnije
2025-03-10
07:47
Search for Higgs boson exotic decays into Lorentz-boosted light bosons in the four-$\tau$ final state at $\sqrt{s}=13$ TeV with the ATLAS detector
A search for exotic decays of the Higgs boson into a pair of low-mass scalars that subsequently decay into $\tau$-leptons, $H\rightarrow aa\rightarrow \tau^+\tau^-\tau^+\tau^-$, is presented. [...]
CERN-EP-2025-038. - 2025
Fulltext - Previous draft version

Detaljnije