0000000000484920

AUTHOR

A. Michalon

showing 9 related works from this author

Harmonic decomposition of two particle angular correlations in Pb–Pb collisions at sNN=2.76 TeV

2012

Angular correlations between unidentified charged trigger (t) and associated (a) particles are measured by the ALICE experiment in Pb-Pb collisions at root s(NN) = 2.76 TeV for transverse momenta 0.25 p(T)(a). The shapes of the pair correlation distributions are studied in a variety of collision centrality classes between 0 and 50% of the total hadronic cross section for particles in the pseudorapidity interval |eta| 0.8, and are referred to as "long-range correlations". Fourier components V-n Delta equivalent to are extracted from the long-range azimuthal correlation functions. If particle pairs are correlated to one another through their individual correlation to a common symmetry plane, …

PhysicsNuclear and High Energy Physics010308 nuclear & particles physicsHadronElementary particle01 natural sciencesDecompositionDistribution (mathematics)Correlation functionPseudorapidity0103 physical sciencesHarmonicParticleAtomic physicsNuclear Experiment010306 general physicsPhysics Letters B
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Alignment of the ALICE Inner Tracking System with cosmic-ray tracks

2010

ALICE (A Large Ion Collider Experiment) is the LHC (Large Hadron Collider) experiment devoted to investigating the strongly interacting matter created in nucleus-nucleus collisions at the LHC energies. The ALICE ITS, Inner Tracking System, consists of six cylindrical layers of silicon detectors with three different technologies; in the outward direction: two layers of pixel detectors, two layers each of drift, and strip detectors. The number of parameters to be determined in the spatial alignment of the 2198 sensor modules of the ITS is about 13,000. The target alignment precision is well below 10 micron in some cases (pixels). The sources of alignment information include survey measurement…

Physics - Instrumentation and DetectorsPhysics::Instrumentation and DetectorsperspectiveHigh Energy PhisicsDetector alignment and calibration methods (lasers sources particle-beams); Particle tracking detectors (Solid-state detectors); Instrumentation; Mathematical Physics01 natural sciences7. Clean energylaw.inventionHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)lawParticle tracking detectors[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Tracking detectors; High Energy Phisics; Heavy Ion PhysicsDetectors and Experimental TechniquesDetector alignment and calibration methodsNuclear ExperimentInstrumentationphysics.ins-detMathematical PhysicsdetectorsPhysicsLarge Hadron ColliderSolenoidal vector fieldPhysicsDetectorInstrumentation and Detectors (physics.ins-det)particle-beams)collisionsParticle tracking detectors (Solid-state detectors) ; Detector alignment and calibration methods (lasers ; sources ; particle-beams)collaboration; collisions; detector alignment and calibration methods (lasers; sources; particle-beams); detectors; particle tracking detectors (solid-state detectors); performance; perspective; quark-gluon plasmaColliding beam accelerators collisions Pb-Pb collisionsParticle tracking detectors (Solid-state detectors); Detector alignment and calibration methods (lasers sources particle-beams); QUARK-GLUON PLASMAperformancesourcesquark-gluon plasmaDetector alignment and calibration methodFOS: Physical sciencesCosmic ray114 Physical sciencesNuclear physicsTracking detectorsOpticsparticle tracking detectors (solid-state detectors)0103 physical sciences[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]010306 general physicsColliderPixel010308 nuclear & particles physicsbusiness.industryhep-exHeavy Ion Physicsdetector alignment and calibration methods (laserscollaborationQuark–gluon plasmaDetector alignment and calibration methods; Particle tracking detectorsALICE (propellant)business
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Light vector meson production in pp collisions at s=7 TeV

2012

The ALICE experiment has measured low-mass dimuon production in pp collisions at root s = 7 TeV in the dimuon rapidity region 2.5 < y < 4. The observed dimuon mass spectrum is described as a superposition of resonance decays (eta, rho, omega, eta', phi) into muons and semi-leptonic decays of charmed mesons. The measured production cross sections for omega and phi are sigma(omega)(1 < p(t) < 5 GeV/c. 2.5 < y < 4) = 5.28 +/- 0.54(stat) +/- 0.49(syst) mb and sigma(phi)(1 < p(t) < 5 GeV/c. 2.5 < y < 4) = 0.940 +/- 0.084(stat) +/- 0.076(syst) mb. The differential cross sections d(2)sigma/dy dp(t) are extracted as a function of p(t) for omega and phi. The ratio between the rho and omega cross sec…

PhysicsParticle physicsNuclear and High Energy PhysicsMuonMeson010308 nuclear & particles physicsPhysicsHadronElementary particle01 natural sciencesOmegaNuclear physicsParticle decayLight vector meson0103 physical sciencesALICE; LHC; CERN; vector meson; pp; 7 TeVHigh Energy Physics::ExperimentRapidityVector mesonNuclear Experiment010306 general physicsPhysics Letters B
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The ALICE experiment at the CERN LHC

2008

Journal of Instrumentation 3(08), S08002 (2008). doi:10.1088/1748-0221/3/08/S08002

visible and IR photonsLiquid detectorshigh energyPhotonPhysics::Instrumentation and DetectorsTransition radiation detectorsTiming detectors01 natural sciencesOverall mechanics designParticle identificationSoftware architecturesParticle identification methodsGaseous detectorscluster findingDetector cooling and thermo-stabilizationDetector groundingParticle tracking detectors[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Special cablesDetector alignment and calibration methodsDetectors and Experimental TechniquesNuclear ExperimentVoltage distributions.Photon detectors for UVInstrumentationMathematical PhysicsQuantum chromodynamicsPhysicsLarge Hadron ColliderSpectrometersPhysicsDetectorcalibration and fitting methodsTransition radiation detectorScintillatorsData processing methodsAnalysis and statistical methodsData reduction methodsParticle physicsCherenkov and transition radiationTime projection chambers610dE/dx detectorsNuclear physicsCalorimetersPattern recognitionGamma detectors0103 physical sciencesddc:610Solid state detectors010306 general physicsMuonInstrumentation for heavy-ion acceleratorsSpectrometerLarge detector systems for particle and astroparticle physics010308 nuclear & particles physicsCERN; LHC; ALICE; heavy ion; QGPCherenkov detectorsComputingVoltage distributionsManufacturingscintillation and light emission processesanalysis and statistical methods; calorimeters; cherenkov and transition radiation; cherenkov detectors; computing; data processing methods; data reduction methods; de/dx detectors; detector alignment and calibration methods; detector cooling and thermo-stabilization; detector design and construction technologies and materials; detector grounding; gamma detectors; gaseous detectors; instrumentation for heavy-ion accelerators; instrumentation for particle accelerators and storage rings - high energy; large detector systems for particle and astroparticle physics; liquid detectors; manufacturing; overall mechanics design; particle identification methods; particle tracking detectors; pattern recognition; cluster finding; calibration and fitting methods; photon detectors for uv; visible and ir photons; scintillators; scintillation and light emission processes; simulation methods and programs; software architectures; solid state detectors; special cables; spectrometers; time projection chambers; timing detectors; transition radiation detectors; voltage distributionsInstrumentation for particle accelerators and storage ringsInstrumentation; Mathematical PhysicsHigh Energy Physics::ExperimentSimulation methods and programsDetector design and construction technologies and materials
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Two-pion Bose-Einstein correlations inppcollisions ats=900  GeV

2010

We report on the measurement of two-pion correlation functions from pp collisions at root s = 900 GeV performed by the ALICE experiment at the Large Hadron Collider. Our analysis shows an increase of the Hanbury Brown-Twiss radius with increasing event multiplicity, in line with other measurements done in particle- and nuclear collisions. Conversely, the strong decrease of the radius with increasing transverse momentum, as observed at the Relativistic Heavy Ion Collider and at Tevatron, is not manifest in our data.

PhysicsNuclear and High Energy PhysicsParticle physicsLarge Hadron ColliderMeson010308 nuclear & particles physicsNuclear TheoryHadronTevatronParticle acceleratorBose–Einstein correlations01 natural scienceslaw.inventionNuclear physicsPionlaw0103 physical sciencesHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsRelativistic Heavy Ion ColliderPhysical Review D
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Midrapidity Antiproton-to-Proton Ratio inppCollisons ats=0.9and 7 TeV Measured by the ALICE Experiment

2010

The ratio of the yields of antiprotons to protons in pp collisions has been measured by the ALICE experiment at root s = 0.9 and 7 TeV during the initial running periods of the Large Hadron Collider. The measurement covers the transverse momentum interval 0.45 < p(t) < 1.05 GeV/c and rapidity vertical bar y vertical bar < 0.5. The ratio is measured to be R-vertical bar y vertical bar<0.5 = 0.957 +/- 0.006(stat) +/- 0.0014(syst) at 0.9 Tev and R-vertical bar y vertical bar<0.5 = 0.991 +/- 0.005 +/- 0.014(syst) at 7 TeV and it is independent of both rapidity and transverse momentum. The results are consistent with the conventional model of baryon-number transport and set stringent limits on a…

PhysicsParticle physicsLarge Hadron ColliderProton010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyHadronGeneral Physics and Astronomy01 natural sciences7. Clean energyParticle identificationBaryonNuclear physicsAntiproton0103 physical sciencesHigh Energy Physics::ExperimentRapidityNuclear Experiment010306 general physicsBar (unit)Physical Review Letters
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Neutral pion and η meson production in proton–proton collisions at s=0.9 TeV and s=7 TeV

2012

The first measurements of the invariant differential cross sections of inclusive pi(0) and eta meson production at mid-rapidity in proton-proton collisions root s = 0.9 TeV and root s = 7 TeV are reported. The pi(0) measurement covers the ranges 0.4 < p(T) < 7 GeV/c and 0.3 < p(T) < 25 GeV/c for these two energies, respectively. The production of eta mesons was measured at root s = 7 TeV in the range 0.4 < p(T) < 15 GeV/c. Next-to-Leading Order perturbative QCD calculations, which are consistent with the pi(0) spectrum at root s = 0.9 TeV, overestimate those of pi(0) and eta mesons at root s = 7 TeV, but agree with the measured eta/pi(0) ratio at root s = 7 TeV. (C) 2012 CERN. Published by …

PhysicsQuantum chromodynamicsNuclear and High Energy PhysicsParticle physicsLarge Hadron ColliderMeson010308 nuclear & particles physicsAstrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::PhenomenologyEta mesonHadronPerturbative QCDElementary particle01 natural sciencesNuclear physicsPion0103 physical sciencesPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsPhysics Letters B
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The ALICE Collaboration

2009

The production of mesons containing strange quarks (KS, φ) and both singly and doubly strange baryons ( , , and − + +) are measured at mid-rapidity in pp collisions at √ s = 0.9 TeV with the ALICE experiment at the LHC. The results are obtained from the analysis of about 250 k minimum bias events recorded in 2009. Measurements of yields (dN/dy) and transverse momentum spectra at mid-rapidity for inelastic pp collisions are presented. For mesons, we report yields (〈dN/dy〉) of 0.184 ± 0.002(stat.) ± 0.006(syst.) for KS and 0.021 ± 0.004(stat.) ± 0.003(syst.) for φ. For baryons, we find 〈dN/dy〉 = 0.048 ± 0.001(stat.) ± 0.004(syst.) for , 0.047 ± 0.002(stat.) ± 0.005(syst.) for and 0.0101 ± 0.0…

PhysicsStrange quarkNuclear and High Energy PhysicsLarge Hadron ColliderMeson010308 nuclear & particles physics7. Clean energy01 natural sciencesSpectral lineVisual artsNuclear physicsBaryonMinimum biasTransverse momentum0103 physical sciencesHigh Energy Physics::ExperimentAstrophysics::Earth and Planetary AstrophysicsALICE (propellant)Nuclear Experiment010306 general physics
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J/ψPolarization inppCollisions ats=7  TeV

2012

The ALICE Collaboration has studied J/psi production in pp collisions at root s = 7 TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/psi polarization parameters lambda(theta) and lambda(phi) were obtained. The study was performed in the kinematic region 2: 5 < y < 4, 2 < p(t) < 8 GeV/c, in the helicity and Collins-Soper reference frames. In both frames, the polarization parameters are compatible with zero, within uncertainties.

PhysicsParticle physicsMuonLarge Hadron ColliderPhysics::Instrumentation and Detectors010308 nuclear & particles physicsGeneral Physics and AstronomyLambdaPolarization (waves)01 natural sciencesHelicityNuclear physicsAzimuthAngular distribution0103 physical sciencesHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsReference framePhysical Review Letters
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