M. Akbiyik

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 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…

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…

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…

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…

Observation of $t t ˉ γ γ$ production at $s =$ 13 TeV with the ATLAS detector

ATLAS Collaboration

This paper presents the first observation of top-quark pair production in association with two photons ( $t t ˉ γ γ$ ). The measurement is performed in the single-lepton decay chann…

hep-ex2025★ 3 cited

Transforming jet flavour tagging at ATLAS

ATLAS Collaboration

Jet flavour tagging enables the identification of jets originating from heavy-flavour quarks in proton-proton collisions at the Large Hadron Collider, playing a critical role in it…

hep-ex2025★ 2 cited

A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps

ATLAS Collaboration

A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. Simultaneous, continuous corrections to t…

Observation of double parton scattering in same-sign W boson pair production in pp collisions at $s = 13$ TeV with the ATLAS detector

ATLAS Collaboration

This letter reports the measurement of double parton scattering in same-sign W boson pair production with the ATLAS detector. The data set used corresponds to an integrated luminos…

nucl-ex2025

Characterization of nuclear breakup as a function of hard-scattering kinematics using dijets measured by ATLAS in $p$ +Pb collisions

ATLAS Collaboration

This Letter analyzes the sensitivity of event geometry estimators to the initial-state kinematics of hard scattering in proton-lead collisions. This analysis uses dijets as a proxy…

Search for a new pseudoscalar decaying into a pair of bottom and antibottom quarks in top-associated production in $s$ =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 $b$ -q…

hep-ex2025★ 3 cited

Measurement of the top quark mass with the ATLAS detector using $t t ˉ$ events with a high transverse momentum top quark

ATLAS Collaboration

The mass of the top quark is measured using top-antitop-quark pair events with high transverse momentum top quarks. The dataset, collected with the ATLAS detector in proton--proton…

Estimation of backgrounds from jets misidentified as $τ$ -leptons using the Universal Fake Factor method with the ATLAS detector

ATLAS Collaboration

Processes with $τ$ -leptons in the final state are important for Standard Model measurements and searches for physics beyond the Standard Model. The ATLAS experiment at the Large Ha…

Configuration, Performance, and Commissioning of the ATLAS $b$ -jet Triggers for the 2022 and 2023 LHC data-taking periods

ATLAS Collaboration

In 2022 and 2023, the Large Hadron Collider produced approximately two billion hadronic interactions each second from bunches of protons that collide at a rate of 40 MHz. The ATLAS…

hep-ex2024★ 6 cited

Observation of $V V Z$ production at $s = 13$ TeV with the ATLAS detector

ATLAS Collaboration

A search for the production of three massive vector bosons, $V V Z (V = W, Z)$ , in proton-proton collisions at $s = 13$ TeV is performed using data with an integrated luminosity…

hep-ex2024★ 7 cited

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…

hep-ex2024

Search for Higgs boson decays into a pair of pseudoscalar particles in the $γ γ τ_{had} τ_{had}$ final state using $pp$ collisions at $s = 13$ 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 $τ$ -lepton pair, is…

Test of lepton flavour universality in $W$ -boson decays into electrons and $τ$ -leptons using $pp$ collisions at $s = 13$ TeV with the ATLAS detector

ATLAS Collaboration

A measurement of the ratio of the branching fractions, $R_{τ / e} = B (W \to τ ν) / B (W \to e ν)$ , is performed using a sample of $W$ bosons originating from top-quark decays to final s…

hep-ex2024

Reconstruction and identification of pairs of collimated $τ$ -leptons decaying hadronically using $s = 13$ TeV $pp$ collision data with the ATLAS detector

ATLAS Collaboration

This paper describes an algorithm for reconstructing and identifying a highly collimated hadronically decaying $τ$ -lepton pair with low transverse momentum. When two $τ$ -leptons ar…

Search for supersymmetry in final states with missing transverse momentum and charm-tagged jets using 139 fb $^{- 1}$ of proton-proton collisions at $s =$ 13 TeV with the ATLAS detector

ATLAS Collaboration

The paper presents a search for supersymmetric particles produced in proton-proton collisions at $s =$ 13 TeV and decaying into final states with missing transverse momentum…

Search for a new scalar decaying into new spin-1 bosons in four-lepton final states with the ATLAS detector

ATLAS Collaboration

A search is conducted for a new scalar boson $S$ , with a mass distinct from that of the Higgs boson, decaying into four leptons ( $ℓ =$ $e$ , $μ$ ) via an intermediate state contai…

hep-ex2024★ 2 cited

Search for single-production of vector-like quarks decaying into $W b$ in the fully hadronic final state in $pp$ collisions at $s = 13$ TeV with the ATLAS detector

ATLAS Collaboration

A search for $T$ and $Y$ vector-like quarks produced in proton-proton collisions at a centre-of-mass energy of $13 TeV$ and decaying into $W b$ in the fully hadronic final s…