Viser treff 21-40 av 134

• #### Longitudinal Flow Decorrelations in Xe+Xe Collisions at √sNN =5.44 TeV with the ATLAS Detector ﻿

(Journal article; Peer reviewed, 2021)
The first measurement of longitudinal decorrelations of harmonic flow amplitudes vn for n=2–4 in Xe+Xe collisions at √sNN=5.44 TeV is obtained using 3 μb−1 of data with the ATLAS detector at the LHC. The decorrelation ...
• #### Measurement of azimuthal anisotropy of muons from charm and bottom hadrons in Pb+Pb collisions at √sNN=5.02 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020-08-10)
Azimuthal anisotropies of muons from charm and bottom hadron decays are measured in Pb+Pb collisions at √sNN = 5.02 TeV. The data were collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2018 with ...
• #### Measurement of azimuthal anisotropy of muons from charm and bottom hadrons in pp collisions at √s=13  TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020)
The elliptic flow of muons from the decay of charm and bottom hadrons is measured in pp collisions at √s=13  TeV using a data sample with an integrated luminosity of 150  pb−1 recorded by the ATLAS detector at the LHC. The ...
• #### Measurement of b-quark fragmentation properties in jets using the decay B± → J/ψK± in pp collisions at √s = 13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2021)
The fragmentation properties of jets containing b-hadrons are studied using charged B mesons in 139 fb−1 of pp collisions at √s = 13 TeV, recorded with the ATLAS detector at the LHC during the period from 2015 to 2018. The ...
• #### Measurement of differential cross sections for single diffractive dissociation in √s = 8 TeV pp collisions using the ATLAS ALFA spectrometer ﻿

(Journal article; Peer reviewed, 2020-02-06)
A dedicated sample of Large Hadron Collider proton-proton collision data at centre-of-mass energy s√ = 8 TeV is used to study inclusive single diffractive dissociation, pp → X p. The intact final-state proton is reconstructed ...
• #### Measurement of hadronic event shapes in high-pT multijet final states at √s = 13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2021)
A measurement of event-shape variables in proton-proton collisions at large momentum transfer is presented using data collected at √s = 13 TeV with the ATLAS detector at the Large Hadron Collider. Six event-shape variables ...
• #### Measurement of isolated-photon plus two-jet production in pp collisions at √s = 13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020-03-30)
The dynamics of isolated-photon plus two-jet production in pp collisions at a centre-of-mass energy of 13 TeV are studied with the ATLAS detector at the LHC using a dataset corresponding to an integrated luminosity of 36.1 ...
• #### Measurement of J/ψ production in association with a W± boson with pp data at 8 TeV ﻿

(Journal article; Peer reviewed, 2020-01-16)
A measurement of the production of a prompt J/ψ meson in association with a W± boson with W± → μν and J/ψ → μ+μ− is presented for J/ψ transverse momenta in the range 8.5–150 GeV and rapidity |yJ/ψ| < 2.1 using ATLAS data ...
• #### Measurement of light-by-light scattering and search for axion-like particles with 2.2 nb^−1 of Pb+Pb data with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2021)
This paper describes a measurement of light-by-light scattering based on Pb+Pb collision data recorded by the ATLAS experiment during Run 2 of the LHC. The study uses 2.2 nb−1 of integrated luminosity collected in 2015 and ...
• #### Measurement of long-range two-particle azimuthal correlations in Z-boson tagged pp collisions at √s=8 and 13 TeV ﻿

(Journal article; Peer reviewed, 2020-01-25)
Results are presented from the measurement by ATLAS of long-range (|Δη|>2) dihadron angular correlations in s√=8 and 13 TeV pp collisions containing a Z boson. The analysis is performed using 19.4 fb−1 of s√=8 TeV data ...
• #### Measurement of single top-quark production in association with a W boson in the single-lepton channel at √s = 8 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2021)
The production cross-section of a top quark in association with a W boson is measured using proton–proton collisions at √s=8TeV. The dataset corresponds to an integrated luminosity of 20.2fb^−1, and was collected in 2012 ...
• #### Measurement of soft-drop jet observables in pp collisions with the ATLAS detector at √s=13  TeV ﻿

(Journal article; Peer reviewed, 2020-03-17)
Jet substructure quantities are measured using jets groomed with the soft-drop grooming procedure in dijet events from 32.9 fb−1 of pp collisions collected with the ATLAS detector at √s=13 TeV. These observables are sensitive ...
• #### Measurement of the associated production of a Higgs boson decaying into b-quarks with a vector boson at high transverse momentum in pp collisions at √s=13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2021)
The associated production of a Higgs boson with a W or Z boson decaying into leptons and where the Higgs boson decays to a b¯ b pair is measured in the high vector-boson transverse momentum regime, above 250 GeV, with the ...
• #### Measurement of the azimuthal anisotropy of charged-particle production in Xe+Xe collisions at $\sqrt{s_{NN}}$=5.44 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020-02-10)
This paper describes the measurements of flow harmonics v2–v6 in 3μb−1 of Xe+Xe collisions at $\sqrt{s_{NN}}$=5.44 TeV performed using the ATLAS detector at the Large Hadron Collider (LHC). Measurements of the centrality, ...
• #### Measurement of the CP-violating phase ϕs in B0s→J/ψϕ decays in ATLAS at 13 TeV ﻿

(Journal article; Peer reviewed, 2021)
A measurement of the B0s→J/ψϕ decay parameters using 80.5fb−1 of integrated luminosity collected with the ATLAS detector from 13 TeV proton–proton collisions at the LHC is presented. The measured parameters include the ...
• #### Measurement of the jet mass in high transverse momentum Z(→bb‾)γ production at √s=13TeV using the ATLAS detector ﻿

(Journal article; Peer reviewed, 2021)
The integrated fiducial cross-section and unfolded differential jet mass spectrum of high transverse momentum Z → bb decays are measured in Zγ events in proton–proton collisions at √s = 13 TeV. The data analysed were ...
• #### Measurement of the Lund jet plane using charged particles in 13 TeV proton-proton collisions with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020-06-04)
The prevalence of hadronic jets at the LHC requires that a deep understanding of jet formation and structure is achieved in order to reach the highest levels of experimental and theoretical precision. There have been many ...
• #### Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2021)
A measurement of prompt photon-pair production in proton-proton collisions at √s = 13 TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb−1. Events with two ...
• #### Measurement of the relative B±c/B± production cross section with the ATLAS detector at √s=8  TeV ﻿

(Journal article; Peer reviewed, 2021)
The total cross section and differential cross sections for the production of B±c mesons, times their branching fraction to J/ψπ±, are measured relative to those for the production of B± mesons, times their branching ...
• #### Measurement of the transverse momentum distribution of Drell–Yan lepton pairs in proton–proton collisions at √s=13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020)
This paper describes precision measurements of the transverse momentum pℓℓT (ℓ=e,μ) and of the angular variable ϕ∗η distributions of Drell–Yan lepton pairs in a mass range of 66–116 GeV. The analysis uses data from 36.1 ...