In process

A search for long-lived particles in events with significant missing transverse momentum and at least one displaced vertex is presented. This analysis is performed using 137 fb$^{−1}$ of pp collision data collected between 2016-2018 during Run 2 of the Large Hadron Collider by the ATLAS detector [...]

This paper presents the first search for non-resonant Higgs boson pair production in association with a top-quark pair ($ t\overline{t} HH $) using proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider. The data sample corresponds to an integrated luminosity of 196 fb$^{−1}$, comprising 140 fb$^{−1}$ at a centre-of-mass energy of $ \sqrt{s}=13 $ TeV and 56 fb$^{−1}$ at 13.6 TeV [...]

The first measurement of the magnitude of the CKM quark mixing matrix element |V$_{cb}$| using on-shell W-boson decays is presented. The measurement is made with $ t\overline{t} $ events from pp collision data corresponding to an integrated luminosity of 140 fb$^{−1}$ at a centre-of-mass energy of 13 TeV collected by the ATLAS experiment at the Large Hadron Collider [...]

A search for charged lepton flavour violation in $τ\to 3μ$ decays is performed in $pp$ collisions at a centre-of-mass energy of 13 TeV using ATLAS data collected between 2016 and 2018, corresponding to an integrated luminosity of 137 $\text{fb}^{-1}$. The search focuses on the electroweak $W \to τν$ production channel. [...]

This Letter reports on the first evidence of inclusive Higgs-boson production at high transverse momentum in the bb¯ final state, reconstructed in a single large-radius jet. The results are based on proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider at a center-of-mass energies of 13 and 13.6 TeV, corresponding to a total integrated luminosity of 301 fb-1. [...]

We explore the potential for extracting proton structure functions, proton parton density functions (PDFs), and the strong coupling αs(Mz2), using early science data from the future Electron-Ion Collider (EIC), both stand-alone, and in combination with data from the Hadron-Electron Ring Accelerator (HERA). Different scenarios are considered in which samples with modest luminosity are collected at either two or three EIC beam energy configurations. [...]

We explore the potential for extracting proton structure functions, proton parton density functions (PDFs), and the strong coupling αs(Mz2), using early science data from the future Electron-Ion Collider (EIC), both stand-alone, and in combination with data from the Hadron-Electron Ring Accelerator (HERA). Different scenarios are considered in which samples with modest luminosity are collected at either two or three EIC beam energy configurations. [...]

A combination of measurements sensitive to anomalous quartic electroweak gauge boson couplings is presented using proton–proton collision data collected by the ATLAS detector at s=13 TeV at the LHC. Contributing analyses include measurements of vector-boson scattering in numerous final states as well as a tri-boson measurement. [...]

A combination of measurements of the CP properties of Higgs boson interactions with electroweak gauge bosons is presented, using 140 fb-1 of proton-proton collisions at s=13 TeV recorded by the ATLAS detector. Results from vector boson fusion H→ττ/WW*/γγ, inclusive H→ZZ*, and WH,H→bb¯ channels are combined. [...]

A search is conducted in proton–proton collisions at the Large Hadron Collider for photon-induced production pp → pp + γγ, (γγ → VX) of a visible particle V decaying into a pair of same-flavour charged leptons (e$^{+}$e$^{−}$ or μ$^{+}$μ$^{−}$) and an undetected invisible component X. Measurements of the outgoing proton energies by the ATLAS forward proton spectrometer allow the full photon–photon four-momentum to be reconstructed [...]