Now showing items 41-60 of 89

• #### Measurements of four-lepton production in pp collisions at s√= 8 TeV with the ATLAS detector ﻿

(Elsevier BV, 2016)
The four-lepton (4ℓ, ℓ=e,μ) production cross section is measured in the mass range from 80 to 1000 GeV using 20.3 fb−1 of data in pp collisions at s√=8 TeV collected with the ATLAS detector at the LHC. The 4ℓ events are ...
• #### Measurements of Jet Vetoes and Azimuthal Decorrelations in Dijet Events Produced in pp Collisions at √s=7 TeV Using the ATLAS Detector ﻿

(Springer Nature, 2014)
Additional jet activity in dijet events is measured using pp collisions at ATLAS at a centre-of-mass energy of √s=7 TeV, for jets reconstructed using the anti-kt algorithm with radius parameter R=0.6. This is done using ...
• #### Measurements of the Higgs boson production and decay rates and coupling strengths using pp collision data at √s=7 and 8 TeV in the ATLAS experiment ﻿

(Springer Nature, 2016)
Combined analyses of the Higgs boson production and decay rates as well as its coupling strengths to vector bosons and fermions are presented. The combinations include the results of the analyses of the H → γγ, ZZ*, WW*, ...
• #### Measurements of the W Production Cross Sections in Association With Jets With the ATLAS Detector ﻿

(Springer Nature, 2015)
This paper presents cross sections for the production of a W boson in association with jets, measured in proton--proton collisions at √s=7 TeV with the ATLAS experiment at the Large Hadron Collider. With an integrated ...
• #### Measurements of top quark spin observables in tt¯ events using dilepton final states in s√=8 TeV pp collisions with the ATLAS detector ﻿

(Springer Nature, 2017)
Measurements of top quark spin observables in tt¯ events are presented based on 20.2 fb−1 of s√=8 TeV proton-proton collisions recorded with the ATLAS detector at the LHC. The analysis is performed in the dilepton final ...
• #### Measurements of top-quark pair differential cross-sections in the eμ channel in pp collisions at s√=13 TeV using the ATLAS detector ﻿

(Springer Nature, 2017)
This article presents measurements of tt¯ differential cross-sections in a fiducial phase-space region, using an integrated luminosity of 3.2 fb−1 of proton--proton data at a centre-of-mass energy of s√=13 TeV recorded by ...
• #### Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at s√=8 TeV using the ATLAS detector ﻿

(Springer Nature, 2016)
Measurements of normalized differential cross-sections of top-quark pair production are presented as a function of the top-quark, tt¯ system and event-level kinematic observables in proton-proton collisions at a centre-of-mass ...
• #### Measurements of top-quark pair to Z-boson cross-section ratios at s√=13,8,7TeV with the ATLAS detector ﻿

(Springer Nature, 2017)
Ratios of top-quark pair to Z-boson cross sections measured from proton--proton collisions at the LHC centre-of-mass energies of s√=13TeV, 8TeV, and 7TeV are presented by the ATLAS Collaboration. Single ratios, at a given ...
• #### Observation and measurements of the production of prompt and non-prompt J/ψ mesons in association with a Z boson in pp collisions at √s=8 TeV with the ATLAS detector ﻿

(Springer Nature, 2015)
The production of a Z boson in association with a J/ψ meson in proton-proton collisions probes the production mechanisms of quarkonium and heavy flavour in association with vector bosons, and allows studies of multiple ...
• #### Performance of b-Jet Identification in the ATLAS Experiment ﻿

(IOP Publishing, 2016)
The identification of jets containing b hadrons is important for the physics programme of the ATLAS experiment at the Large Hadron Collider. Several algorithms to identify jets containing b hadrons are described, ranging ...
• #### Performance of pile-up mitigation techniques for jets in pp collisions at √s=8 TeV using the ATLAS detector ﻿

(Springer Nature, 2016)
The large rate of multiple simultaneous proton--proton interactions, or pile-up, generated by the Large Hadron Collider in Run 1 required the development of many new techniques to mitigate the adverse effects of these ...
• #### Performance of the ATLAS Muon Trigger in pp Collisions at √s=8 TeV ﻿

(Springer Nature, 2015)
The performance of the ATLAS muon trigger system is evaluated with proton-proton collision data collected in 2012 at the Large Hadron Collider at a centre-of-mass energy of 8 TeV. It is primarily evaluated using events ...
• #### Performance of the ATLAS trigger system in 2015 ﻿

(Springer Nature, 2017)
During 2015 the ATLAS experiment recorded 3.8 fb−1 of proton--proton collision data at a centre-of-mass energy of 13 TeV. The ATLAS trigger system is a crucial component of the experiment, responsible for selecting events ...
• #### Probing the Wtb vertex structure in t-channel single-top-quark production and decay in pp collisions at s√=8 TeV with the ATLAS detector ﻿

(Springer Nature, 2017)
To probe the Wtb vertex structure, top-quark and W-boson polarisation observables are measured from t-channel single-top-quark events produced in proton--proton collisions at a centre-of-mass energy of 8 TeV. The dataset ...
• #### Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC ﻿

(Springer Nature, 2017)
This paper presents the method and performance of primary vertex reconstruction in proton-proton collision data recorded by the ATLAS experiment during Run 1 of the LHC. The studies presented focus on data taken during ...
• #### Search for a New Resonance Decaying to a W or Z Boson and a Higgs Boson in the ℓℓ/ℓν/νν+bb¯ Final States With the ATLAS Detector ﻿

(Springer Nature, 2015)
A search for a new resonance decaying to a W or Z boson and a Higgs boson in the ℓℓ/ℓν/νν+bb¯ final states is performed using 20.3 fb-1 of pp collision data recorded at √s= 8 TeV with the ATLAS detector at the Large Hadron ...
• #### Search for an additional, heavy Higgs boson in the H→ZZ decay channel at s√ = 8 TeV in pp collision data with the ATLAS detector ﻿

(Springer Nature, 2016)
A search is presented for a high-mass Higgs boson in the H→ℓℓℓℓ, H→ℓℓνν, H→ℓℓqq, and H→ννqq decay modes using the ATLAS detector at the CERN Large Hadron Collider. The search uses proton-proton collision data at a ...
• #### Search for anomalous couplings in the Wtb vertex from the measurement of double differential angular decay rates of single top quarks produced in the t-channel with the ATLAS detector ﻿

(Springer Nature, 2016)
The electroweak production and subsequent decay of single top quarks is determined by the properties of the Wtb vertex. This vertex can be described by the complex parameters of an effective Lagrangian. An analysis of ...
• #### Search for Contact Interactions and Large Extra Dimensions in the Dilepton Channel Using Proton–proton Collisions at √s = 8 TeV With the ATLAS Detector ﻿

(2014)
Research is conducted for non-resonant new phenomena in dielectron and dimuon final states, originating from either contact interactions or large extra spatial dimensions. The LHC 2012 proton–proton collision dataset ...
• #### Search for Dark Matter in Events With Heavy Quarks and Missing Transverse Momentum in pp Collisions With the ATLAS Detector ﻿

(Springer Nature, 2015)
This article reports on a search for dark matter pair production in association with bottom or top quarks in 20.3 fb−1 of pp collisions collected at s√=8 TeV by the ATLAS detector at the LHC. Events with large missing ...