H. Lyons

Measurement of the top-quark mass using decays with a $J / ψ$ meson at $s =$ 13 TeV with the ATLAS detector

ATLAS Collaboration

The top-quark mass is measured using top-quark decays producing an isolated lepton and $J / ψ$ meson reconstructed in its $μ^{+} μ^{-}$ decay mode. The data sample was recorded with the A…

Search for higgsinos in compressed mass spectra using low-momentum tracks in $pp$ collisions at $s = 13$ TeV with the ATLAS detector

ATLAS Collaboration

This paper presents two searches for the electroweak production of higgsinos with compressed mass spectra using 140 fb $^{- 1}$ of $s = 13$ TeV proton-proton collision data coll…

Measurement of the Higgs boson production in association with top quarks in multilepton final states in $pp$ collisions at $s = 13$ TeV with the ATLAS detector

Atlas Collaboration

A measurement of the associated production of a top-quark pair with the Higgs boson ( $t t ˉ H$ ) in multilepton final states is presented. The analysis is based on a data sample o…

Constraints on effective field theories via quadruple-differential angular decay rates from $t$ -channel single-top-quark production at $s = 13$ TeV with the ATLAS detector

ATLAS Collaboration

Events with $t$ -channel single top quarks are used to probe effective field theory operators in $s = 13$ TeV proton-proton collision data corresponding to 140 fb $^{- 1}$ record…

A search for electroweak $t t ˉ W j$ production in multileptonic final states at $s = 13$ TeV with the ATLAS detector and bounds on effective field theory operators

ATLAS Collaboration

A search is presented for the electroweak production of a top quark pair in association with a $W$ boson and at least one additional jet, known as the ${t\bar{t}W\kern-0.2em j_{\ma…

Measurement of the top-quark Yukawa coupling from $t t$ production in the lepton+jets final state using $pp$ collisions at $s = 13$ TeV with the ATLAS detector

ATLAS Collaboration

The top-quark Yukawa coupling is extracted from the distribution of the top-quark pair ( $t t$ ) invariant mass in proton-proton collisions using 140 $f b^{- 1}$ of data a…

Observation of $W^{+} W^{-} γ$ production in $pp$ collisions at $s$ = 13 TeV with the ATLAS detector and constraints on anomalous quartic gauge-boson couplings

ATLAS Collaboration

This Letter reports the observation of $W^{+} W^{-} γ$ triboson production in 140 fb $^{- 1}$ of data collected by the ATLAS detector from proton--proton collisions at a centre-of-mass…

Search for Higgs bosons produced in association with a high-energy photon via vector-boson fusion and decaying to a pair of $b$ -quarks in the ATLAS detector

ATLAS Collaboration

A search for Standard Model Higgs bosons produced in association with a high-energy photon and decaying to $b b ˉ$ is performed using 133 fb $^{- 1}$ of $s = 13$ TeV $pp$ col…

Measurement of the $W$ -boson angular coefficients and transverse momentum in $pp$ collisions at $s =$ 13 TeV with the ATLAS detector

The ATLAS Collaboration

The angular distributions of Drell-Yan lepton pairs provide sensitive probes of the underlying dynamics of quantum chromodynamics (QCD) effects in vector-boson production. This pap…

Observation of structures in the $J / ψ + ψ (2 S)$ mass spectrum with the ATLAS detector

ATLAS Collaboration

A search for resonant structures in the $J / ψ + ψ$ (2S) mass spectrum is performed using proton--proton collision data at $s = 13$ TeV, corresponding to an integrated luminosity o…

nucl-ex2025★ 9 cited

Measurement of the azimuthal anisotropy of charged particles in $s_{NN} = 5.36$ TeV $^{16}$ O $+^{16}$ O and $^{20}$ Ne $+^{20}$ Ne collisions with the ATLAS detector

ATLAS Collaboration

This paper presents the first measurements of the azimuthal anisotropy coefficients $v_{n}$ , which quantify the $n^{th}$ -order Fourier modulation of charged-particle azimu…

nucl-ex2025★ 2 cited

Measurement of coherent exclusive $J / ψ \to μ^{+} μ^{-}$ production in ultraperipheral Pb+Pb collisions at $s_{NN} = 5.36$ TeV with the ATLAS detector

ATLAS Collaboration

The ATLAS experiment has performed a measurement of coherent exclusive $J / ψ \to μ^{+} μ^{-}$ production in ultraperipheral Pb+Pb collisions at $s_{NN} = 5.36$ TeV. The data…

Search for heavy neutral leptons in decays of W bosons produced in 13 TeV pp collisions using prompt signatures in the ATLAS detector

ATLAS Collaboration

The existence of right-handed neutrinos with Majorana masses below the electroweak scale could help address the origins of neutrino masses, the matter-antimatter asymmetry, and dar…

Search for Beyond the Standard Model physics with anomaly detection in multilepton final states in $pp$ collisions at $s = 13$ TeV with the ATLAS detector

ATLAS Collaboration

A model-agnostic search for Beyond the Standard Model physics is presented, targeting final states with at least four light leptons (electrons or muons). The search regions are sep…

Search for the production of a Higgs boson in association with a single top quark in $pp$ collisions at $s = 13$ TeV with the ATLAS detector

ATLAS Collaboration

A search for the production of a Higgs boson in association with a single top quark, $t H$ , is presented. The analysis uses proton-proton collision data corresponding to an integrat…

Search for the Higgs boson decay to a $Z$ boson and a photon in $pp$ collisions at $s = 13$ TeV and $13.6$ TeV with the ATLAS detector

ATLAS Collaboration

A search for the Higgs boson decay to a $Z$ boson and a photon in the $ℓℓ γ$ ( $ℓ = e, μ$ ) final state is performed using $pp$ collisions at $s = 13.6$ TeV recorded wit…

Search for resonant leptoquark production via lepton-jet signatures in $pp$ collisions at $s = 13$ TeV and $s = 13.6$ TeV with the ATLAS detector

ATLAS Collaboration

This paper presents a search for physics beyond the Standard Model targeting a heavy resonance visible in the invariant mass of the lepton-jet system. The analysis focuses on final…

hep-ex2025★ 3 cited

Evidence for the dimuon decay of the Higgs boson in pp collisions with the ATLAS detector

ATLAS Collaboration

A search for the dimuon decay of the Higgs boson is presented based on pp collision data recorded by ATLAS during Run 3 of the Large Hadron Collider, corresponding to an integrated…

Measurements and interpretations of $W^{\pm} Z$ production cross-sections in $pp$ collisions at $s =$ 13 TeV with the ATLAS detector

ATLAS Collaboration

Measurements of integrated and differential cross-sections for $W^{\pm} Z$ production in proton-proton collisions are presented. The data collected by the ATLAS detector at the Larg…

hep-ex2025★ 3 cited

Study of Higgs boson pair production in the $H H \to b b γ γ$ final state with 308 fb $^{- 1}$ of data collected at $s =$ 13 TeV and 13.6 TeV by the ATLAS experiment

ATLAS Collaboration

A search for Higgs boson pair production in the $b b ˉ γ γ$ final state is performed. The proton-proton collision dataset corresponds to an integrated luminosity of 308 fb$^{-1}…

Measurement of the top-quark pole mass in dileptonic $t t ˉ + 1 -jet$ events at $s = 13$ TeV with the ATLAS experiment

ATLAS Collaboration

A measurement of the top-quark pole mass $m_{t}^{pole}$ is presented in $t t ˉ$ events with an additional jet, $t t ˉ + 1 -jet$ , produced in $pp$ collisions at $\sqr…

A search for dark matter produced in association with a dark Higgs boson decaying into a Higgs boson pair in 3 $b$ or 4 $b$ final states using $pp$ collisions at $s = 13$ TeV with the ATLAS detector

ATLAS Collaboration

A search is performed for dark matter particles produced in association with a resonant pair of Higgs bosons using 140 fb $^{- 1}$ of proton--proton collisions at a centre-of-mass en…

Search for decays of the Higgs boson into scalar particles decaying into four or six $b$ -quarks using $pp$ collisions at $s = 13 TeV$ with the ATLAS detector

ATLAS Collaboration

A search for exotic decays of the Higgs boson $H$ into new scalar or pseudoscalar particles that subsequently decay into $b$ -quarks is presented. The search considers $Z H$ producti…