Browsing Department of Physics and Technology by Subject "VDP::Kjerne- og elementærpartikkelfysikk: 431"
Now showing items 21-40 of 214
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Direct constraint on the Higgs–charm coupling from a search for Higgs boson decays into charm quarks with the ATLAS detector
(Journal article; Peer reviewed, 2022)A search for the Higgs boson decaying into a pair of charm quarks is presented. The analysis uses proton–proton collisions to target the production of a Higgs boson in association with a leptonically decaying W or Z boson. ... -
Electron and photon performance measurements with the ATLAS detector using the 2015-2017 LHC proton-proton collision data
(Journal article; Peer reviewed, 2019)This paper describes the reconstruction of electrons and photons with the ATLAS detector, employed for measurements and searches exploiting the complete LHC Run 2 dataset. An improved energy clustering algorithm is introduced, ... -
Elliptic and triangular flow of (anti)deuterons in Pb-Pb collisions at √sNN=5.02 TeV
(Journal article; Peer reviewed, 2020-11-17)The measurements of the (anti)deuteron elliptic flow (v2) and the first measurements of triangular flow (v3) in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon collision √sNN = 5.02 TeV are presented. A ... -
Evidence for electroweak production of two jets in association with a Zγ pair in pp collisions at √s = 13 TeV with the ATLAS detector
(Journal article; Peer reviewed, 2020-04-10)Evidence for electroweak production of two jets in association with a Zγ pair in √s = 13 TeV proton– proton collisions at the Large Hadron Collider is presented. The analysis uses data collected by the ATLAS detector in ... -
Evidence for Higgs boson decays to a low-mass dilepton system and a photon in pp collisions at √s = 13 TeV with the ATLAS detector
(Journal article; Peer reviewed, 2021)A search for the Higgs boson decaying into a photon and a pair of electrons or muons with an invariant mass mℓℓ<30 GeV is presented. The analysis is performed using 139 fb−1 of proton–proton collision data, produced by the ... -
Evidence for tt¯ tt¯ production in the multilepton final state in proton–proton collisions at √s=13 TeV with the ATLAS detector
(Journal article; Peer reviewed, 2020-11-24)A search is presented for four-top-quark production using an integrated luminosity of 139 fb−1 of proton–proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are ... -
Evidence of rescattering effect in Pb–Pb collisions at the LHC through production of K⁎(892)0 and ϕ(1020) mesons
(Journal article; Peer reviewed, 2020)Measurements of K∗(892)0 and φ(1020) resonance production in Pb–Pb and pp collisions at √sNN = 5.02 TeV with the ALICE detector at the Large Hadron Collider are reported. The resonances are measured at midrapidity (|y| ... -
Evidence of spin-orbital angular momentum interactions in relativistic heavy-ion collisions
(Journal article; Peer reviewed, 2020)The first evidence of spin alignment of vector mesons (K*0 and ϕ) in heavy-ion collisions at the Large Hadron Collider (LHC) is reported. The spin density matrix element ρ00 is measured at midrapidity (|y|<0.5) in Pb-Pb ... -
Exclusive dimuon production in ultraperipheral Pb+Pb collisions at √sNN=5.02 TeV with ATLAS
(Journal article; Peer reviewed, 2021)Exclusive dimuon production in ultraperipheral collisions (UPC), resulting from photon-photon interactions in the strong electromagnetic fields of colliding high-energy lead nuclei, PbPb(γ γ ) → μ+μ−(Pb() Pb() ), is studied ... -
Experimental Evidence for an Attractive p-φ Interaction
(Journal article; Peer reviewed, 2021)This Letter presents the first experimental evidence of the attractive strong interaction between a proton and a ϕ meson. The result is obtained from two-particle correlations of combined p-ϕ⊕ p¯-ϕ pairs measured in ... -
Exploration of jet substructure using iterative declustering in pp and Pb–Pb collisions at LHC energies
(Journal article; Peer reviewed, 2020)The ALICE collaboration at the CERN LHC reports novel measurements of jet substructure in pp collisions at √s = 7 TeV and central Pb–Pb collisions at √sNN = 2.76 TeV. Jet substructure of track-based jets is explored via ... -
First measurements of N-subjettiness in central Pb-Pb collisions at √sNN = 2.76 TeV
(Journal article; Peer reviewed, 2021)The ALICE Collaboration reports the first fully-corrected measurements of the N-subjettiness observable for track-based jets in heavy-ion collisions. This study is performed using data recorded in pp and Pb-Pb collisions ... -
First study of the two-body scattering involving charm hadrons
(Journal article; Peer reviewed, 2022)This article presents the first measurement of the interaction between charm hadrons and nucleons. The two-particle momentum correlations of pD− and ¯pD+ pairs are measured by the ALICE Collaboration in high-multiplicity ... -
Fluctuations of anisotropic flow in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector
(Journal article; Peer reviewed, 2020-01-09)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 ... -
Global polarization of Λ Λ hyperons in Pb-Pb collisions at √sNN = 2.76 and 5.02 TeV
(Journal article; Peer reviewed, 2020)The global polarization of the and hyperons is measured for Pb-Pb collisions at √sNN = 2.76 and 5.02 TeV recorded with the ALICE at the Large Hadron Collider (LHC). The results are reported differentially as a function ... -
Higgs boson production cross-section measurements and their EFT interpretation in the 4 ℓ decay channel at √s= 13 TeV with the ATLAS detector
(Journal article; Peer reviewed, 2020-10)Higgs boson properties are studied in the four-lepton decay channel (where lepton = e, μ) using 139 fb−1 of proton–proton collision data recorded at s√=13 TeV by the ATLAS experiment at the Large Hadron Collider. The ... -
Higher harmonic non-linear flow modes of charged hadrons in Pb-Pb collisions at √sNN = 5.02 TeV
(Journal article; Peer reviewed, 2020)Anisotropic flow coefficients, vn, non-linear flow mode coefficients, χn,mk, and correlations among different symmetry planes, ρn,mk are measured in Pb-Pb collisions at sNN−−−√ = 5.02 TeV. Results obtained with multi-particle ... -
Inclusive J/ψ production at midrapidity in pp collisions at √s=13 TeV
(Journal article; Peer reviewed, 2021)We report on the inclusive \(\text {J}/\psi \) production cross section measured at the CERN Large Hadron Collider in proton–proton collisions at a center-of-mass energy \(\sqrt{s}~=~13\) TeV. The \(\text {J}/\psi \) mesons ... -
Inclusive quarkonium production in pp collisions at √s = 5.02 TeV
(Journal article; Peer reviewed, 2023)This article reports on the inclusive production cross section of several quarkonium states, \(\textrm{J}/\psi \), \(\psi \mathrm{(2S)}\), \(\Upsilon \mathrm (1S)\), \(\Upsilon \mathrm{(2S)}\), and \(\Upsilon \mathrm{(3S)}\), ... -
Investigation of the p–Σ0 interaction via femtoscopy in pp collisions
(Journal article; Peer reviewed, 2020-06-10)This Letter presents the first direct investigation of the p–Σ0 interaction, using the femtoscopy technique in high-multiplicity pp collisions at √s = 13 TeV measured by the ALICE detector. The Σ0 is reconstructed via the ...