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2025-04-03
17:03
Characterization of nuclear breakup as a function of hard-scattering kinematics using dijets measured by ATLAS in $p$+Pb collisions
This Letter analyzes the sensitivity of event geometry estimators to the initial-state kinematics of hard scattering in proton-lead collisions. [...]
CERN-EP-2025-077. - 2025
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2025-04-01
13:10
Evidence for the collective nature of radial flow in Pb+Pb collisions with the ATLAS detector / ATLAS Collaboration
Anisotropic flow and radial flow are two key probes of the expansion dynamics and properties of the quark-gluon plasma (QGP). [...]
CERN-EP-2025-068 ; arXiv:2503.24125. - 2025 - 31 p, 31.
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2025-03-29
17:12
Search for electroweak production of vector-like leptons in $\tau$-lepton and $b$-jet final states in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector / ATLAS Collaboration
A search for pair-production of vector-like leptons is presented, considering their decays into a third-generation Standard Model (SM) quark and a vector leptoquark ($U_1$) as predicted by an ultraviolet-complete extension of the SM, referred to as the '4321' model. [...]
arXiv:2503.22581 ; CERN-EP-2025-055. - 2025 - 60.
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2025-03-26
17:07
Search for events with one displaced vertex from long-lived neutral particles decaying into hadronic jets in the ATLAS muon spectrometer in $pp$ collisions at $\sqrt{s}=13$ TeV / ATLAS Collaboration
A search for events with one displaced vertex from long-lived particles using data collected by the ATLAS detector at the Large Hadron Collider is presented, using 140 fb$^{-1}$ of proton-proton collision data at $\sqrt{s} = 13$ TeV recorded in 2015-2018. [...]
arXiv:2503.20445 ; CERN-EP-2025-062. - 2025 - 57.
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2025-03-25
19:31
A measurement of the high-mass $\tau\bar{\tau}$ production cross-section at $\sqrt{s}=13$ TeV with the ATLAS detector and constraints on new particles and couplings / ATLAS Collaboration
The production cross-section of high-mass $\tau$-lepton pairs is measured as a function of the dilepton visible invariant mass, using 140 fb$^{-1}$ of $\sqrt{s}=13$ TeV proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider. [...]
arXiv:2503.19836 ; CERN-EP-2025-063. - 2025 - 50.
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2025-03-25
19:21
Measurements of the production cross-sections of a Higgs boson in association with a vector boson and decaying into $WW^\ast$ with the ATLAS detector at $\sqrt{s} = 13$ TeV / ATLAS Collaboration
Measurements of the total and differential Higgs boson production cross-sections, via $WH$ and $ZH$ associated production using $H\rightarrow WW^\ast\rightarrow\ell\nu\ell\nu$ and $H\rightarrow WW^\ast\rightarrow\ell\nu jj$ decays, are presented. [...]
arXiv:2503.19420 ; CERN-EP-2025-037. - 2025 - 76.
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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 / ATLAS Collaboration
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. [...]
arXiv:2503.17461 ; CERN-EP-2025-050. - 2025 - 61.
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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.
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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. [...]
arXiv:2503.17186 ; CERN-EP-2025-039. - 2025 - 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.
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