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Erratum to: Search for single top-quark production via flavour-changing neutral...

Santos, S. P. Amor dos; Carvalho, J.; Fiolhais, M. C. N.; Galhardo, B.; Onofre, A.; Veloso, F.; Wolters, H.; Atlas Collaboration


Measurements of top-quark pair spin correlations in the eμ channel at √ s = 13 ...

Santos, S. P. Amor dos; Fiolhais, M. C. N.; Galhardo, B.; Veloso, F.; Wolters, H.; ATLAS Collaboration

A measurement of observables sensitive to spin correlations in t ¯t production is presented, using 36.1 fb−1 of pp collision data at √ s = 13 TeV recorded with the ATLAS detector at the Large Hadron Collider. Differential cross-sections are measured in events with exactly one electron and one muon with opposite-sign electric charge as a function of the azimuthal opening angle and the absolute difference in pseu...


Measurement of long-range two-particle azimuthal correlations in Z-boson tagged...

Santos, S. P. Amor dos; Fiolhais, M. C. N.; Veloso, F.; Wolters, H.; Galhardo, B.; ATLAS Collaboration

Results are presented from the measurement by ATLAS of long-range (| η| > 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 recorded during Run 1 of the LHC and 36.1 fb−1 of √ s = 13 TeV data recorded during Run 2. Two-particle correlation functions are measured as a function of relative azimuthal angle over t...


Determination of jet calibration and energy resolution in proton–proton collisi...

Santos, S. P. Amor dos; Fiolhais, M. C. N.; Veloso, F.; Galhardo, B.; Wolters, H.; ATLAS Collaboration

The jet energy scale, jet energy resolution, and their systematic uncertainties are measured for jets reconstructed with the ATLAS detector in 2012 using proton– proton data produced at a centre-of-mass energy of 8 TeV with an integrated luminosity of 20 fb−1. Jets are reconstructed from clusters of energy depositions in the ATLAS calorimeters using the anti-kt algorithm. A jet calibration scheme is applied in ...


Fluctuations of anisotropic flow in Pb+Pb collisions at √sNN = 5.02 TeV with th...

Fiolhais, M. C. N.; Galhardo, B.; Veloso, F.; Wolters, H.; Santos, S. P. Amor dos; ATLAS Collaboration

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 information on the event-by-event fluctuations of harmonic flow coefficients vn and correlated fluctuations between two harmonics vn and vm. For the first time, a non-zero four-particle cumulant is obs...


Measurement of J/ψ production in association with a W ± boson with pp data at 8...

Santos, S. P. Amor dos; Fiolhais, M. C. N.; Galhardo, B.; Veloso, F.; Wolters, H.; ATLAS Collaboration

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 recorded in 2012 at the LHC. The data were taken at a proton-proton centre-of-mass energy of s = 8 TeV and correspond to an integrated luminosity of 20.3 fb−1. The ratio of the prompt J/ψ plus ...


Erratum: Measurement of differential cross sections and W + /W − cross-section ...

Santos, S. P. Amor dos; Fiolhais, M. C. N.; Veloso, F.; Wolters, H.; ATLAS Collaboration


Electron reconstruction and identification in the ATLAS experiment using the 20...

Santos, S. P. Amor dos; Fiolhais, M. C. N.; Galhardo, B.; Veloso, F.; Wolters, H.; ATLAS Collaboration

Algorithms used for the reconstruction and identification of electrons in the central region of the ATLAS detector at the Large Hadron Collider (LHC) are presented in this paper; these algorithms are used in ATLAS physics analyses that involve electrons in the final state and which are based on the 2015 and 2016 proton–proton collision data produced by theLHCat √ s = 13TeV. The performance of the electron recon...


Measurement of W±Z production cross sections and gauge boson polarisation in pp...

Santos, S. P. Amor dos; Fiolhais, M. C. N.; Galhardo, B.; Veloso, F.; Wolters, H.; ATLAS Collaboration

This paper presents measurements of W±Z production cross sections in pp collisions at a centre-of-mass energy of 13 TeV. The data were collected in 2015 and 2016 by the ATLAS experiment at the Large Hadron Collider, and correspond to an integrated luminosity of 36.1fb-1. The W±Z candidate events are reconstructed using leptonic decay modes of the gauge bosons into electrons and muons. The measured inclusive cro...


Measurement of the top quark mass in the tt¯ → lepton+jets channel from √s=8 Te...

Santos, S. P. Amor dos; Fiolhais, M. C. N.; Galhardo, B.; Veloso, F.; Wolters, H.; ATLAS Collaboration

The top quark mass is measured using a template method in the tt¯ → lepton + jets channel (lepton is e or μ) using ATLAS data recorded in 2012 at the LHC. The data were taken at a proton–proton centre-of-mass energy of s=8 TeV and correspond to an integrated luminosity of 20.2 fb - 1 . The tt¯ → lepton + jets channel is characterized by the presence of a charged lepton, a neutrino and four jets, two of which or...


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