Now showing items 1-20 of 338

• #### Angular analysis of B d 0  → K∗μ+μ− decays in pp collisions at √s=8 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-10-08)
An angular analysis of the decay B_d^0  → K^∗μ^+μ^− is presented, based on proton-proton collision data recorded by the ATLAS experiment at the LHC. The study is using 20.3 fb^−1 of integrated luminosity collected during ...
• #### Antiproton tagging and vertex fitting in a Timepix3 detector ﻿

(Peer reviewed; Journal article, 2018-06-07)
Studies of antimatter are important for understanding our universe at a fundamental level. There are still unsolved problems, such as the matter-antimatter asymmetry in the universe. The AEgIS experiment at CERN aims at ...
• #### 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 ...
• #### ATLAS search for new phenomena in dijet mass and angular distributions using pp collisions at $\sqrt{s}$=7 TeV ﻿

(Peer reviewed; Journal article, 2013-01)
Mass and angular distributions of dijets produced in LHC proton-proton collisions at a centre-of-mass energy $\sqrt{s}$=7 TeV have been studied with the ATLAS detector using the full 2011 data set with an integrated ...
• #### Combination of inclusive and differential tt¯ charge asymmetry measurements using ATLAS and CMS data at √s=7 and 8 TeV ﻿

(Peer reviewed; Journal article, 2018-04-09)
This paper presents combinations of inclusive and differential measurements of the charge asymmetry (AC) in top quark pair (tt¯) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC ...
• #### Combination of searches for heavy resonances decaying into bosonic and leptonic final states using 36  fb−1 of proton-proton collision data at √s=13 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-09-26)
Searches for new heavy resonances decaying into different pairings of W, Z, or Higgs bosons, as well as directly into leptons, are presented using a data sample corresponding to 36.1 fb^−1 of pp collisions at √s = 13 TeV ...
• #### Combination of Searches for Invisible Higgs Boson Decays with the ATLAS Experiment ﻿

(Peer reviewed; Journal article, 2019)
Dark matter particles, if sufficiently light, may be produced in decays of the Higgs boson. This Letter presents a statistical combination of searches for H → invisible decays where H is produced according to the standard ...
• #### Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at √s = 8 TeV ﻿

(Journal article; Peer reviewed, 2020-08)
The combination of measurements of the W boson polarization in top quark decays performed by the ATLAS and CMS collaborations is presented. The measurements are based on proton-proton collision data produced at the LHC at ...
• #### Combinations of single-top-quark production cross-section measurements and |fLVVtb| determinations at √s = 7 and 8 TeV with the ATLAS and CMS experiments ﻿

(Peer reviewed; Journal article, 2019)
This paper presents the combinations of single-top-quark production cross-section measurements by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at s√ = 7 and 8 TeV corresponding to integrated ...
• #### Combined measurement of differential and total cross sections in the H → γγ and the H → ZZ⁎ → 4ℓ decay channels at √s = 13 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-09-17)
A combined measurement of differential and inclusive total cross sections of Higgs boson production is performed using 36.1 fb^−1 of 13 TeV proton–proton collision data produced by the LHC and recorded by the ATLAS detector ...
• #### Comparison of fragmentation functions for jets dominated by light quarks and gluons from pp and Pb+Pb collisions in ATLAS ﻿

(Peer reviewed; Journal article, 2019)
Charged-particle fragmentation functions for jets azimuthally balanced by a high-transverse-momentum, prompt, isolated photon are measured in 25 pb − 1 of p p and 0.49 nb − 1 of Pb + Pb collision data at 5.02 TeV per nucleon ...
• #### Comparison of planar and 3D silicon pixel sensors used for detection of low energy antiprotons ﻿

(Peer reviewed; Journal article, 2014-12)
The principle aim of the AEḡIS experiment at CERN is to measure the acceleration of antihydrogen due to Earth’s gravitational field. This would be a test of the Weak Equivalence Principle, which states that all bodies fall ...
• #### Comprehensive measurements of $t$-channel single top-quark production cross sections at $\sqrt{s} = 7$ TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2014-12-11)
This article presents measurements of the $t$.channel single top-quark $t$ and top-antiquark $\bar{t}$ total production cross sections $\sigma(tq)$ and $\sigma(\bar{t}q)$. their ratio $R_{t}=\sigma(tq)/\si ... • #### Constraints on mediator-based dark matter and scalar dark energy models using √s = 13 TeV pp collision data collected by the ATLAS detector ﻿ (Peer reviewed; Journal article, 2019) Constraints on selected mediator-based dark matter models and a scalar dark energy model using up to 37 fb−1s√ = 13 TeV pp collision data collected by the ATLAS detector at the LHC during 2015-2016 are summarised in this ... • #### Constraints on off-shell Higgs boson production and the Higgs boson total width in ZZ → 4ℓ and ZZ → 2ℓ2ν final states with the ATLAS detector ﻿ (Peer reviewed; Journal article, 2018-09-26) A measurement of off-shell Higgs boson production in the Z Z → 4 and Z Z → 22ν decay channels, where ℓ stands for either an electron or a muon, is performed using data from proton–proton collisions at a centre-of-mass ... • #### Constraints on the off-shell Higgs boson signal strength in the high-mass \(ZZ$ and $WW$ final states with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2015-07)
Measurements of the $ZZ$ and $WW$ final states in the mass range above the $2m_Z$ and $2m_W$ thresholds provide a unique opportunity to measure the off-shell coupling strength of the Higgs boson. This paper presents ...
• #### Correlated long-range mixed-harmonic fluctuations measured in pp, p+Pb and low-multiplicity Pb+Pb collisions with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019)
Correlations of two flow harmonics vn and vm via three- and four-particle cumulants are measured in 13 TeV pp, 5.02 TeV p+Pb, and 2.76 TeV peripheral Pb+Pb collisions with the ATLAS detector at the LHC. The goal is to ...
• #### Cross-section measurements of the Higgs boson decaying into a pair of τ-leptons in proton-proton collisions at √s=13  TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019)
A measurement of production cross sections of the Higgs boson in proton-proton collisions is presented in the H → τ τ decay channel. The analysis is performed using 36.1     fb − 1 of data recorded by the ATLAS experiment ...
• #### Detection of low energy antiproton annihilations in a segmented silicon detector ﻿

(Peer reviewed; Journal article, 2014-06)
The goal of the AEḡIS experiment at the Antiproton Decelerator (AD) at CERN, is to measure directly the Earth’s gravitational acceleration on antimatter by measuring the free fall of a pulsed, cold antihydrogen beam. The ...
• #### Determination of jet calibration and energy resolution in proton–proton collisions at √s=8TeV using the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020)
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 ...