25 research outputs found

    ALICE Collaboration

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    Transverse momentum spectra and nuclear modification factors of charged particles in pp, p-Pb and Pb-Pb collisions at the LHC

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    Measurements of heavy-flavour correlations and jets with ALICE at the LHC

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    In this work, the latest heavy-flavour correlation and jet measurements at mid-rapidity with the ALICE detector in pp, p-Pb and Pb-Pb collisions from the LHC Run 2 are reported. In particular, the results of azimuthal correlation measurements of D mesons with charged particles in pp collisions at root s = 13 TeV and in p-Pb collisions at root S-NN = 5.02 TeV are presented. Studies on the centrality-dependent azimuthal correlations of heavy-flavour hadron decay electrons with charged particles in Pb Pb collisions at root S-NN = 5.02 TeV are shown. In addition, measurements of D-meson tagged jet production in pp collisions at root s = 7 TeV and in p Pb collisions at root S-NN = 5.02 TeV are presented, including studies in pp collisions of the jet momentum fraction carried by the D meson. A first result on the D-meson tagged jet nuclear modification factor in central Pb Pb collisions at root S-NN = 5.02 TeV is also reported

    Hadronic resonances, strange and multi-strange particle production in Xe-Xe and Pb-Pb collisions with ALICE at the LHC

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    We present measurements of hadronic resonance, strange and multi-strange particle production in collisions of Xe-Xe and Pb-Pb at the center-of-mass energies of root s(NN) = 5.44 and 5.02 TeV, respectively, by the ALICE collaboration at the LHC. Particle ratios are presented as a function of multiplicity for K-s(0), Lambda, Xi(-), (Xi) over bar (+), Omega(-), (Omega) over bar (+), rho(770)(0), K*(892)(0), phi(1020) and Lambda(1520). Our results are discussed and compared with predictions of QCD-inspired event generators. Additionally, comparisons with lower energy measurements and smaller systems are also presented

    Systematic studies of correlations between different order flow harmonics in Pb-Pb collisions at root s(NN)=2.76 TeV

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    Direct photon production at low transverse momentum in proton-proton collisions at root s=2.76 and 8 TeV

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    Measurements of inclusive and direct photon production at midrapidity in pp collisions at 1as = 2.76 and 8 TeV are presented by the ALICE experiment at the LHC. The results are reported in transverse momentum ranges of 0.4 7 GeV/c is at least one \u3c3 above unity and consistent with expectations from next-to-leading order pQCD calculations

    Anisotropic flow in Xe–Xe collisions at sNN=5.44 TeV

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    The first measurements of anisotropic flow coefficients vn for mid-rapidity charged particles in Xe–Xe collisions at sNN=5.44 TeV are presented. Comparing these measurements to those from Pb–Pb collisions at sNN=5.02 TeV, v2 is found to be suppressed for mid-central collisions at the same centrality, and enhanced for central collisions. The values of v3 are generally larger in Xe–Xe than in Pb–Pb at a given centrality. These observations are consistent with expectations from hydrodynamic predictions. When both v2 and v3 are divided by their corresponding eccentricities for a variety of initial state models, they generally scale with transverse density when comparing Xe–Xe and Pb–Pb, with some deviations observed in central Xe–Xe and Pb–Pb collisions. These results assist in placing strong constraints on both the initial state geometry and medium response for relativistic heavy-ion collisions

    Dielectron production in proton-proton collisions at root s=7 TeV

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    gamma suppression at forward rapidity in Pb-Pb collisions at root s(NN)=5.02 TeV

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    Measurement of D-0, D+, D*+ and D-s(+) production in Pb-Pb collisions at root s(NN)=5:02 TeV

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