Browsing by Author "Fuenzalida Garrido"

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 root s = 13TeV proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider. The

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 energy of 13TeV recorded by the ATLAS detector at the Large Hadron Collider. This

Neural simulation-based inference (NSBI) is a powerful class of machine-learning-based methods for statistical inference that naturally handles high-dimensional parameter estimation without the need to bin data into low-dimensional summary histograms. Suc

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 for the parton-parton scattering configuration, correlating it with event

Jets with different radius parameters R are an important tool for probing quantum chromodynamics processes at different angular scales. Jets with small R = 0.2 are instrumental in measurements of the substructure of large-R jets resulting from collimated

Processes with tau-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 Hadron Collider observes tau-leptons produced in proton-proton collisions onl

This Letter reports the first evidence of electroweak 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-si

Anisotropic flow and radial flow are two key probes of the expansion dynamics and properties of the quark-gluon plasma (QGP). While anisotropic flow has been extensively studied, radial flow, which governs the systems radial expansion, has received less a

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 luminosity of 165 fb(-1) at root s = 13.6 TeV. To enhance the sensitivity,

The ATLAS experiment has performed a measurement of coherent exclusive J/psi -> mu(+) mu(-) production in ultraperipheral Pb+Pb collisions at root s(NN) = 5.36 TeV. The data was recorded at the Large Hadron Collider (LHC) during 2023, and corresponds to a

The production of single top quarks and top antiquarks via the t-channel exchange of a virtual W boson is measured in proton-proton collisions at a centre-of-mass energy of 13 TeV at the Large Hadron Collider. The full Run 2 data sample recorded with the

This paper presents a first measurement of the cross-section for the charged-current Drell-Yan process pp -> W-+/- -> l(+/-)nu above the resonance region, where l is an electron or muon. The measurement is performed for transverse masses, m(T)(W), between

A measurement of off-shell Higgs boson production in the H*-> ZZ -> 4l decay channel is presented. The measurement uses 140 fb-1 of proton-proton collisions at s=13 TeV collected by the ATLAS detector at the Large Hadron Collider and supersedes the previo

Measurements of jet substructure in Pb+Pb collisions provide key insights into the mechanism of jet quenching in the hot and dense QCD medium created in these collisions.This Letter presents a measurement of the suppression of large-radius jets with a rad

A measurement of the associated production of a top-quark pair with the Higgs boson (t (t) over barH) in multilepton final states is presented. The analysis is based on a data sample of proton-proton collisions at root s = 13 TeV recorded with the ATLAS d

The mass of the top quark is measured using top-quark-top-antiquark pair events with high transverse momentum top quarks. The dataset, collected with the ATLAS detector in proton-proton collisions at root s = 13 TeV delivered by the Large Hadron Collider,

The top-quark mass is measured using top-quark decays producing an isolated lepton and J/psi meson reconstructed in its mu(+)mu(-) decay mode. The data sample was recorded with the ATLAS detector in proton-proton collisions at a centre-of-mass energy of r

A measurement of the top-quark pole mass m(t)(pole) t is presented in t (t) over bar events with an additional jet, t (t) over bar+ 1-jet, produced in pp collisions at root s = 13TeV. The data sample, recorded with the ATLAS experiment during Run 2 of the

The top-quark Yukawa coupling is extracted from the distribution of the top-quark pair (t (t) over bar) invariant mass in proton-proton collisions using 140 fb(-1) of data at root s = 13TeV collected in 2015-2018 by the ATLAS experiment at the Large Hadro

High precision single-differential W +/--boson production cross-sections as a function of electron or muon transverse momentum pT or their pseudorapity., as well as double-differential cross-sections as functions of these variables, are measured in proton