Viser treff 21-40 av 256

• #### 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 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 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 ...
• #### 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 ...
• #### Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at √sNN=5.02 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019)
Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet quenching by the hot and dense QCD matter created in such collisions, the quark-gluon ...
• #### 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 colour flow using jet-pull observables in tt¯events with the ATLAS experiment at √s=13 TeV ﻿

(Peer reviewed; Journal article, 2018-10)
Previous studies have shown that weighted angular moments derived from jet constituents encode the colour connections between partons that seed the jets. This paper presents measurements of two such distributions, the ...
• #### Measurement of differential cross sections and W+/W− cross-section ratios for W boson production in association with jets at s√=8 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-05-11)
This paper presents a measurement of the W boson production cross section and the W +/W − cross-section ratio, both in association with jets, in proton-proton collisions at 𝑠√=8 TeV with the ATLAS experiment at the Large ...
• #### 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 differential cross sections of isolated-photon plus heavy-flavour jet production in pp collisions at √s = 8 TeV using the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-01-10)
This Letter presents the measurement of differential cross sections of isolated prompt photons produced in association with a b-jet or a c-jet. These final states provide sensitivity to the heavy-flavour content of the ...
• #### Measurement of differential cross-sections of a single top quark produced in association with a W boson at s√=13TeV with ATLAS ﻿

(Peer reviewed; Journal article, 2018-03-06)
The differential cross-section for the production of a W boson in association with a top quark is measured for several particle-level observables. The measurements are performed using 36.1fb^−1 of pp collision data collected ...