Viser treff 21-40 av 351

• #### Dijet azimuthal correlations and conditional yields in pp and p+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019)
This paper presents a measurement of forward-forward and forward-central dijet azimuthal angular correlations and conditional yields in proton-proton (pp) and proton-lead (p + Pb) collisions as a probe of the nuclear gluon ...
• #### Dijet resonance search with weak supervision using √s = 13 TeV pp collisions in the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020-09-21)
This Letter describes a search for narrowly resonant new physics using a machine-learning anomaly detection procedure that does not rely on signal simulations for developing the analysis selection. Weakly supervised learning ...
• #### Direct top-quark decay width measurement in the tt¯lepton+jets channel at √s=8 TeV with the ATLAS experiment ﻿

(Peer reviewed; Journal article, 2018-02-15)
This paper presents a direct measurement of the decay width of the top quark using tt¯ events in the lepton+jets final state. The data sample was collected by the ATLAS detector at the LHC in proton–proton collisions at a ...
• #### Electron and photon energy calibration with the ATLAS detector using 2015–2016 LHC proton-proton collision data ﻿

(Peer reviewed; Journal article, 2019)
This paper presents the electron and photon energy calibration obtained with the ATLAS detector using about 36 fb−1 of LHC proton-proton collision data recorded at √ s = 13 TeV in 2015 and 2016. The different calibration ...
• #### Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data ﻿

(Peer reviewed; Journal article, 2014-10-01)
This paper presents the electron and photon energy calibration achieved with the ATLAS detector using about 25 fb −1 of LHC proton–proton collision data taken at centre-of-mass energies of s√=7 and 8 TeV. The reconstruction ...
• #### Electron and photon performance measurements with the ATLAS detector using the 2015-2017 LHC proton-proton collision data ﻿

(Journal article; Peer reviewed, 2019)
This paper describes the reconstruction of electrons and photons with the ATLAS detector, employed for measurements and searches exploiting the complete LHC Run 2 dataset. An improved energy clustering algorithm is introduced, ...
• #### Evidence for electroweak production of two jets in association with a Zγ pair in pp collisions at √s = 13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020-04-10)
Evidence for electroweak production of two jets in association with a Zγ pair in √s = 13 TeV proton– proton collisions at the Large Hadron Collider is presented. The analysis uses data collected by the ATLAS detector in ...
• #### Evidence for electroweak production of W±W±jj in pp collisions at √s =8 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2014-10-03)
This Letter presents the first study of W±W±jj, same-electric-charge diboson production in association with two jets, using 20.3  fb−1 of proton-proton collision data at s√=8  TeV recorded by the ATLAS detector at the Large ...
• #### Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-04-09)
A search for the associated production of the Higgs boson with a top quark pair (t¯tH) is reported. The search is performed in multilepton final states using a data set corresponding to an integrated luminosity of 36.1  fb−1 ...
• #### Evidence for the production of three massive vector bosons with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019)
• #### Evidence for tt¯ tt¯ production in the multilepton final state in proton–proton collisions at √s=13 TeV with the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020-11-24)
A search is presented for four-top-quark production using an integrated luminosity of 139 fb−1 of proton–proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are ...
• #### Fiducial and differential cross sections of Higgs boson production measured in the four-lepton decay channel in $\boldsymbol{pp}$ collisions at $\boldsymbol{\sqrt{s}}$ = 8 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2014-11-10)
Measurements of fiducial and differential cross sections of Higgs boson production in the ${H \rightarrow ZZ ^{*}\rightarrow 4\ell}$ decay channel are presented. The cross sections are determined within a fiducial phase ...
• #### Flavour tagged time dependent angular analysis of the $B_s^{0} \rightarrow J/\psi \phi$ decay and extraction of $\Delta\Gamma_s$ and the weak phase $\phi_s$ in ATLAS ﻿

(Peer reviewed; Journal article, 2014-09)
A measurement of the $B_s ^{0}\rightarrow J/\psi \phi$ decay parameters, updated to include flavour tagging is reported using $4.9 fb^{-1}$ of integrated luminosity collected by the ATLAS detector from $\sqrt{s}= ... • #### Fluctuations of anisotropic flow in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector ﻿ (Journal article; Peer reviewed, 2020-01-09) Multi-particle azimuthal cumulants are measured as a function of centrality and transverse momentum using 470 μb−1 of Pb+Pb collisions at sNN−−−√ = 5.02 TeV with the ATLAS detector at the LHC. These cumulants provide ... • #### Higgs boson production cross-section measurements and their EFT interpretation in the 4 ℓ decay channel at √s= 13 TeV with the ATLAS detector ﻿ (Journal article; Peer reviewed, 2020-10) Higgs boson properties are studied in the four-lepton decay channel (where lepton = e, μ) using 139 fb−1 of proton–proton collision data recorded at s√=13 TeV by the ATLAS experiment at the Large Hadron Collider. The ... • #### Identification of boosted Higgs bosons decaying into b-quark pairs with the ATLAS detector at 13 TeV ﻿ (Peer reviewed; Journal article, 2019) This paper describes a study of techniques for identifying Higgs bosons at high transverse momenta decaying into bottom-quark pairs, H→bb¯, for proton–proton collision data collected by the ATLAS detector at the Large ... • #### In situ calibration of large-radius jet energy and mass in 13 TeV proton–proton collisions with the ATLAS detector ﻿ (Peer reviewed; Journal article, 2019-02-13) The response of the ATLAS detector to largeradius jets is measured in situ using 36.2 fb−1 of √s = 13 TeV proton–proton collisions provided by the LHC and recorded by the ATLAS experiment during 2015 and 2016. The jet ... • #### Jet energy measurement and its systematic uncertainty in proton–proton collisions at √s=7TeV with the ATLAS detector ﻿ (Peer reviewed; Journal article, 2015-01-15) The jet energy scale (JES) and its systematic uncertainty are determined for jets measured with the ATLAS detector using proton–proton collision data with a centre-of-mass energy of s√=7 TeV corresponding to an integrated ... • #### Light-quark and gluon jet discrimination in pp collisions at √s = 7 TeV with the ATLAS detector ﻿ (Peer reviewed; Journal article, 2014-08-21) A likelihood-based discriminant for the identification of quark- and gluon-initiated jets is built and validated using 4.7 fb−1 of proton–proton collision data at √s = 7 TeV collected with the ATLAS detector at the LHC. ... • #### Measurement of \(W$ boson angular distributions in events with high transverse momentum jets at $\sqrt{s}=$ 8 TeV using the ATLAS detector ﻿

(Peer reviewed; Journal article, 2017-02)
The $W$ boson angular distribution in events with high transverse momentum jets is measured using data collected by the ATLAS experiment from proton--proton collisions at a centre-of-mass energy $\sqrt{s}=$ 8 TeV at ...