Now showing items 1-12 of 12

• #### 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 the electroweak production of dijets in association with a Z-boson and distributions sensitive to vector boson fusion in proton-proton collisions at √s= 8 TeV using the ATLAS detector ﻿ (Peer reviewed; Journal article, 2014-04-07) Measurements of fiducial cross sections for the electroweak production of two jets in association with a Z-boson are presented. The measurements are performed using 20.3 fb−1 of proton-proton collision data collected at a ... • #### Measurement of the low-mass Drell-Yan differential cross section at √s = 7 TeV using the ATLAS detector ﻿ (Peer reviewed; Journal article, 2014-06) The differential cross section for the process Z/γ ∗ → ℓℓ (ℓ = e, μ) as a function of dilepton invariant mass is measured in pp collisions at √s = 7 TeV at the LHC using the ATLAS detector. The measurement is performed in ... • #### Measurement of the parity-violating asymmetry parameter αb and the helicity amplitudes for the decay Λb0 →J /ψ Λ0 with the ATLAS detector ﻿ (Peer reviewed; Journal article, 2014-05-27) A measurement of the parity-violating decay asymmetry parameter, αb, and the helicity amplitudes for the decay Λ0b→J/ψ(μ+μ−)Λ0(pπ−) is reported. The analysis is based on 1400 Λ0b and Λ¯0b baryons selected in 4.6 fb−1 of ... • #### Measurement of the top quark pair production charge asymmetry in proton-proton collisions at √s = 7 TeV using the ATLAS detector ﻿ (Peer reviewed; Journal article, 2014-02) This paper presents a measurement of the top quark pair ( tt¯ ) production charge asymmetry A C using 4.7 fb−1 of proton-proton collisions at a centre-of-mass energy s√ = 7 TeV collected by the ATLAS detector at the LHC. ... • #### Measurements of four-lepton production at the Z resonance in pp collisions at √s = 7 and 8 TeV with ATLAS ﻿ (Peer reviewed; Journal article, 2014-06-13) Measurements of four-lepton (4ℓ, ℓ=e,μ) production cross sections at the Z resonance in pp collisions at the LHC with the ATLAS detector are presented. For dilepton and four-lepton invariant mass regions mℓ+ℓ−>5 GeV and ... • #### Search for dark matter in events with a Z boson and missing transverse momentum in pp collisions at √s = 8TeV with the ATLAS detector ﻿ (Peer reviewed; Journal article, 2014-07-10) A search is presented for production of dark-matter particles recoiling against a leptonically decaying Z boson in 20.3 fb⎻¹ of pp collisions at s√=8 TeV with the ATLAS detector at the Large Hadron Collider. Events with ... • #### Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector ﻿ (Peer reviewed; Journal article, 2014-04) A search for the direct production of charginos and neutralinos in final states with three leptons and missing transverse momentum is presented. The analysis is based on 20.3 fb−1 of s√ = 8 TeV proton-proton collision data ... • #### Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector ﻿ (Peer reviewed; Journal article, 2014-06) A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating ... • #### Search for direct top-squark pair production in final states with two leptons in pp collisions at \(\sqrt{s}$=8 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2014-06)
A search is presented for direct top-squark pair production in final states with two leptons (electrons or muons) of opposite charge using 20.3 fb$^{-1}$ of $pp$ collision data at $\sqrt{s}$=8 TeV, collected by the ...