Now showing items 1-20 of 27

• #### ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s=13 TeV ﻿

(Peer reviewed; Journal article, 2019)
The algorithms used by the ATLAS Collaboration during Run 2 of the Large Hadron Collider to identify jets containing b-hadrons are presented. The performance of the algorithms is evaluated in the simulation and the efficiency ...
• #### Evidence for the production of three massive vector bosons with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019)
• #### 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 ...
• #### 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 distributions sensitive to the underlying event in inclusive Z boson production in pp collisions at √s = 13 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019-08-08)
This paper presents measurements of charged-particle distributions sensitive to the properties of the underlying event in events containing a Z boson decaying into a muon pair. The data were obtained using the ATLAS detector ...
• #### Measurement of flow harmonics correlations with mean transverse momentum in lead–lead and proton–lead collisions at √sNN−−−=5.02 TeVwith the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019-12-03)
To assess the properties of the quark–gluon plasma formed in ultrarelativistic ion collisions, the ATLAS experiment at the LHC measures a correlation between the mean transverse momentum and the flow harmonics. The analysis ...
• #### Measurement of K0S and Λ0 production in tt¯ dileptonic events in pp collisions at √s=7 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019-12-17)
Measurements of K0S and Λ0 production in tt¯ final states have been performed. They are based on a data sample with integrated luminosity of 4.6 fb−1 from proton–proton collisions at a centre-of-mass energy of 7 TeV, ...
• #### Measurement of the inclusive cross-section for the production of jets in association with a Z boson in proton–proton collisions at √s=8 TeV using the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019-10-14)
The inclusive cross-section for jet production in association with a Z boson decaying into an electron–positron pair is measured as a function of the transverse momentum and the absolute rapidity of jets using 19.9 fb−1 ...
• #### Measurement of the inclusive isolated-photon cross section in pp collisions at √s = 13 TeV using 36 fb−1 of ATLAS data ﻿

(Peer reviewed; Journal article, 2019-10-18)
The differential cross section for isolated-photon production in pp collisions is measured at a centre-of-mass energy of 13 TeV with the ATLAS detector at the LHC using an integrated luminosity of 36.1 fb−1. The differential ...
• #### Measurement of the top-quark mass in tt¯+ 1-jet events collected with the ATLAS detector in pp collisions at √s = 8 TeV ﻿

(Peer reviewed; Journal article, 2019-11-26)
A determination of the top-quark mass is presented using 20.2 fb−1 of 8 TeV proton-proton collision data produced by the Large Hadron Collider and collected by the ATLAS experiment. The normalised differential cross section ...
• #### Measurement of W± boson production in Pb+Pb collisions at √sNN−−−=5.02 TeVwith the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019-11-18)
A measurement of W± boson production in Pb+Pb collisions at sNN−−−√=5.02 TeV is reported using data recorded by the ATLAS experiment at the LHC in 2015, corresponding to a total integrated luminosity of 0.49nb−1. The W± ...
• #### Measurement of W±-boson and Z-boson production cross-sections in pp collisions at √s=2.76 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019-11-08)
The production cross-sections for W± and Z bosons are measured using ATLAS data corresponding to an integrated luminosity of 4.0 pb−1 collected at a centre-of-mass energy s√=2.76 TeV. The decay channels W→ℓν and Z→ℓℓ are ...
• #### Measurements of the Higgs boson inclusive and differential fiducial cross sections in the 4 ℓ decay channel at √s = 13 TeV ﻿

(Journal article, 2020)
Inclusive and differential fiducial cross sections of the Higgs boson are measured in the H → Z Z∗ → 4 ( = e, μ) decay channel. The results are based on protonproton collision data produced at the Large Hadron Collider at ...
• #### Measurements of top-quark pair differential and double-differential cross-sections in the ℓ+jets channel with pp collisions at √s=13TeV using the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019-12-24)
Single- and double-differential cross-section measurements are presented for the production of top-quark pairs, in the lepton + jets channel at particle and parton level. Two topologies, resolved and boosted, are considered ...
• #### Observation of light-by-light scattering in ultraperipheral Pb+Pb collisions with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019)
• #### Performance of the upgraded PreProcessor of the ATLAS level-1 calorimeter trigger ﻿

(Journal article; Peer reviewed, 2020-11)
The PreProcessor of the ATLAS Level-1 Calorimeter Trigger prepares the analogue trigger signals sent from the ATLAS calorimeters by digitising, synchronising, and calibrating them to reconstruct transverse energy deposits, ...
• #### Properties of jet fragmentation using charged particles measured with the ATLAS detector in pp collisions at √s=13  TeV ﻿

(Peer reviewed; Journal article, 2019)
This paper presents a measurement of quantities related to the formation of jets from high-energy quarks and gluons (fragmentation). Jets with transverse momentum 100 GeV < p T < 2.5 TeV and pseudorapidity | η | < 2.1 from ...
• #### Resolution of the ATLAS muon spectrometer monitoreddrift tubes in LHC Run 2 ﻿

(Peer reviewed; Journal article, 2019)
The momentum measurement capability of the ATLAS muon spectrometer relies fundamentally on the intrinsic single-hit spatial resolution of the monitored drift tube precision tracking chambers. Optimal resolution is achieved ...
• #### Search for a heavy charged boson in events with a charged lepton and missing transverse momentum from pp collisions at √s=13  TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019)
A search for a heavy charged-boson resonance decaying into a charged lepton (electron or muon) and a neutrino is reported. A data sample of 139     fb − 1 of proton-proton collisions at √ s = 13     TeV collected with the ...
• #### Search for bottom-squark pair production with the ATLAS detector in final states containing Higgs bosons, b-jets and missing transverse momentum ﻿

(Peer reviewed; Journal article, 2019)
The result of a search for the pair production of the lightest supersymmetric partner of the bottom quark (b~1) using 139 fb−1 of proton-proton data collected at s√ = 13 TeV by the ATLAS detector is reported. In the ...