Now showing items 1-20 of 124

• #### 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 ...
• #### 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 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 ...
• #### 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 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 ...
• #### 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 Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2015-04-21)
Results of a search for $H \to \tau \tau$ decays are presented, based on the full set of proton--proton collision data recorded by the ATLAS experiment at the LHC during 2011 and 2012. The data correspond to integrated ...
• #### 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}= ... • #### 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 charged-particle spectra in Pb+Pb collisions at (Formula presented.) = 2.76 TeV with the ATLAS detector at the LHC ﻿ (Peer reviewed; Journal article, 2015-09-09) Charged-particle spectra obtained in Pb+Pb interactions at sNN−−−√=2.76 TeV and pp interactions at sNN−−−√=2.76 TeV with the ATLAS detector at the LHC are presented, using data with integrated luminosities of 0.15 nb−1 and ... • #### 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 dijet azimuthal decorrelations in pp collisions at √s=8 TeV with the ATLAS detector and determination of the strong coupling ﻿ (Peer reviewed; Journal article, 2018-11-07) A measurement of the rapidity and transverse momentum dependence of dijet azimuthal decorrelations is presented, using the quantity RΔϕ. The quantity RΔϕ specifies the fraction of the inclusive dijet events in which the ... • #### Measurement of distributions sensitive to the underlying event in inclusive Z-boson production in pp collisions at √s = 7 TeV with the ATLAS detector ﻿ (Peer reviewed; Journal article, 2014-12-10) A measurement of charged-particle distributions sensitive to the properties of the underlying event is presented for an inclusive sample of events containing a TeX -boson, decaying to an electron or muon pair. The measurement ... • #### Measurement of flow harmonics with multi-particle cumulants in Pb+Pb collisions at (Formula presented.) TeV with the ATLAS detector ﻿ (Peer reviewed; Journal article, 2014-11-26) ATLAS measurements of the azimuthal anisotropy in lead–lead collisions at TeX TeV are shown using a dataset of approximately 7 TeX b TeX collected at the LHC in 2010. The measurements are performed for charged particles ... • #### Measurement of Higgs boson production in the diphoton decay channel in \(pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2014-12-24)
A measurement of the production processes of the recently discovered Higgs boson is performed in the two-photon final state using 5.4 fb$^{-1}$ of proton-proton collisions data at $\sqrt{s}=7$ TeV and 20.3 fb$^{-1}$ ...
• #### Measurement of inclusive jet and dijet cross-sections in proton-proton collisions at √s=13 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-05-30)
Inclusive jet and dijet cross-sections are measured in proton-proton collisions at a centre-of-mass energy of 13 TeV. The measurement uses a dataset with an integrated luminosity of 3.2 fb−1 recorded in 2015 with the ATLAS ...
• #### Measurement of jet fragmentation in 5.02 TeV proton–lead and proton–proton collisions with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-10)
A measurement of the fragmentation functions of jets into charged particles in collisions and pp collisions is presented. The analysis utilizes 28 nb−1 of data and 26 pb−1 of pp data, both at = 5.02 TeV, collected in 2013 ...
• #### Measurement of jet fragmentation in Pb+Pb collisions at $\sqrt{s_\mathrm{NN}} = 2.76$ TeV with the ATLAS detector at the LHC ﻿

(Peer reviewed; Journal article, 2017-06)
The distributions of transverse momentum and longitudinal momentum fraction of charged particles in jets are measured in Pb+Pb and pp collisions with the ATLAS detector at the LHC. The distributions are measured as a ...