Blar i Faculty of Mathematics and Natural Sciences på tidsskrift "Physical Review Letters"
Viser treff 1-20 av 89
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Anisotropic flow of charged particles in Pb-Pb collisions at \(\sqrt{s_{\rm NN}}\) = 5.02 TeV
(Peer reviewed; Journal article, 2016-04)We report the first results of elliptic \(v_2\) , triangular \(v_3\) and quadrangular flow \(v_4\) of charged particles in Pb--Pb collisions at \(\sqrt{s_{_{\rm NN}}}=\) 5.02 TeV with the ALICE detector at the CERN ... -
Anomalous evolution of the near-side jet peak shape in Pb-Pb collisions at \(\sqrt{s_{\mathrm{NN}}}\) = 2.76 TeV
(Peer reviewed; Journal article, 2017-09-08)The measurement of two-particle angular correlations is a powerful tool to study jet quenching in a \(p_{\mathrm{T}}\) region inaccessible by direct jet identification. In these measurements pseudorapidity \(\Delta\eta\) ... -
Azimuthal Anisotropy of Heavy-Flavor Decay Electrons in p-Pb Collisions at √sNN=5.02 TeV
(Peer reviewed; Journal article, 2019)Angular correlations between heavy-flavor decay electrons and charged particles at midrapidity ( | η | < 0.8 ) are measured in p -Pb collisions at √ s N N = 5.02 TeV . The analysis is carried out for the 0%–20% (high) ... -
Azimuthally differential pion femtoscopy in Pb-Pb collisions at \(\sqrt{s_{\rm NN}}=2.76\) TeV
(Peer reviewed; Journal article, 2017-06)We present the first azimuthally differential measurements of the pion source size relative to the second harmonic event plane in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon pair of \(\sqrt{s_{\rm ... -
Charge separation relative to the reaction plane in Pb-Pb collisions at \(\sqrt{s_{NN}}\)= 2.76 TeV
(Peer reviewed; Journal article, 2013-01)Measurements of charge dependent azimuthal correlations with the ALICE detector at the LHC are reported for Pb-Pb collisions at \(\sqrt{s_{NN}}\) = 2.76 TeV. Two- and three-particle charge-dependent azimuthal correlations ... -
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 ... -
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 ... -
Cone-Size Dependence of Jet Suppression in Heavy-Ion Collisions
(Journal article; Peer reviewed, 2021)The strong suppression of high-pT jets in heavy-ion collisions is a result of elastic and inelastic energy loss suffered by the jet multiprong collection of color charges that are resolved by medium interactions. Hence, ... -
Correlated event-by-event fluctuations of flow harmonics in Pb-Pb collisions at \(\sqrt{s_{\rm NN}}=2.76\) TeV
(Peer reviewed; Journal article, 2016-10)We report the measurements of correlations between event-by-event fluctuations of amplitudes of anisotropic flow harmonics in nucleus–nucleus collisions, obtained for the first time using a new analysis method based on ... -
CP Properties of Higgs Boson Interactions with Top Quarks in the tt¯ H and tH Processes Using H→γγ with the ATLAS Detector
(Journal article; Peer reviewed, 2020-08-05)A study of the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and top quarks is presented. Higgs bosons are identified via the diphoton decay channel (H→γγ), and their production ... -
D meson elliptic flow in non-central Pb-Pb collisions at \(\sqrt{s_{NN}}\) = 2.76TeV
(Peer reviewed; Journal article, 2013-09)Azimuthally anisotropic distributions of \(D^0, D^+\) and \(D^{*+}\) mesons were studied in the central rapidity region (|y| < 0.8) in Pb-Pb collisions at a centre-of-mass energy \(\sqrt{s_{NN}}\) = 2.76 TeV per nucleon-nucleon ... -
D-meson azimuthal anisotropy in mid-central Pb-Pb collisions at \(\mathbf{\sqrt{s_{\rm NN}}=5.02}\) TeV
(Peer reviewed; Journal article, 2018-03)The azimuthal anisotropy coefficient \(v_2\) of prompt D\)^0\), D\)^+\), D\)^{*+}\) and D\(_s^+\) mesons was measured in mid-central (30-50% centrality class) Pb-Pb collisions at a centre-of-mass energy per nucleon pair ... -
Dijet resonance search with weak supervision using √s = 13 TeV pp collisions in the ATLAS detector
(Journal article; Peer reviewed, 2020-09-21)This Letter describes a search for narrowly resonant new physics using a machine-learning anomaly detection procedure that does not rely on signal simulations for developing the analysis selection. Weakly supervised learning ... -
Directed flow of charged particles at mid-rapidity relative to the spectator plane in Pb-Pb collisions at \(\sqrt{s_{NN}}\)=2.76 TeV
(Peer reviewed; Journal article, 2013-12)The directed flow of charged particles at midrapidity is measured in Pb-Pb collisions at \(\sqrt{s_{NN}}\).2.76 TeV relative to the collision plane defined by the spectator nucleons. Both, the rapidity odd \(v_1^{odd}\) ... -
Electron Heating by Debye-Scale Turbulence in Guide-Field Reconnection
(Journal article; Peer reviewed, 2020)We report electrostatic Debye-scale turbulence developing within the diffusion region of asymmetric magnetopause reconnection with a moderate guide field using observations by the Magnetospheric Multiscale mission. We show ... -
Elliptic Flow of Electrons from Beauty-Hadron Decays in Pb-Pb Collisions at sNN =5.02 TeV
(Journal article; Peer reviewed, 2021)The elliptic flow of electrons from beauty hadron decays at midrapidity (|y| < 0.8) is measured in Pb-Pb collisions at √sNN = 5.02 TeV with the ALICE detector at the LHC. The azimuthal distribution of the particles produced ... -
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 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 J /ψ photoproduction off protons in ultraperipheral p-Pb collisions at √sNN = 5.02TeV
(Peer reviewed; Journal article, 2014-12-05)We present the first measurement at the LHC of exclusive J/ψ photoproduction off protons, in ultraperipheral proton-lead collisions at √sNN=5.02 TeV. Events are selected with a dimuon pair produced either in the rapidity ... -
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 ...