0000000000373555

AUTHOR

R. Alfaromolina

showing 2 related works from this author

The ALICE Transition Radiation Detector: Construction, operation, and performance

2018

The Transition Radiation Detector (TRD) was designed and built to enhance the capabilities of the ALICE detector at the Large Hadron Collider (LHC). While aimed at providing electron identification and triggering, the TRD also contributes significantly to the track reconstruction and calibration in the central barrel of ALICE. In this paper the design, construction, operation, and performance of this detector are discussed. A pion rejection factor of up to 410 is achieved at a momentum of 1 GeV/$c$ in p-Pb collisions and the resolution at high transverse momentum improves by about 40% when including the TRD information in track reconstruction. The triggering capability is demonstrated both …

Physics - Instrumentation and Detectors:Kjerne- og elementærpartikkelfysikk: 431 [VDP]TRPhysics::Instrumentation and DetectorsCOLLIDING BEAM EXPERIMENT; ELECTRON IDENTIFICATION; DRIFT CHAMBERS; TRD PROTOTYPES; ENERGY-LOSS; GEV/C; COLLISIONS; PIONSparticle identification [electron]Ionisation energy loTracking (particle physics)Transition radiation detector ; Multi-wire proportional drift chamber ; Fibre/foam sandwich radiator ; Xenon-based gas mixture ; Tracking ; Ionisation energy loss ; dE/dx ; TR ; Electron-pion identification ; Neural network ; Trigger01 natural sciencesParticle identificationdesign [detector]ALICEDetectors and Experimental Techniquesmomentum resolutionNuclear Experimentphysics.ins-detInstrumentationPhysicsPROTOTYPESLarge Hadron Collidertransition radiation detector; multi-wire proportional drift chamber;; fibre/foam sandwich radiator; Xenon-based gas mixture; tracking;; Ionisation energy loss; dE/dx; TR; electron-pion identification; Neural; network; trigger; COLLIDING BEAM EXPERIMENT; ELECTRON IDENTIFICATION; DRIFT CHAMBERS; TRD; PROTOTYPES; ENERGY-LOSS; GEV/C; COLLISIONS; PIONStrack data analysisTrackingPIONSDetectorVDP::Kjerne- og elementærpartikkelfysikk: 431Instrumentation and Detectors (physics.ins-det)trackingtransition radiation detector:Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431 [VDP]ddc:PRIRODNE ZNANOSTI. Fizika.Xenon-based gas mixtureTransition radiation detector:Nuclear and elementary particle physics: 431 [VDP]VDP::Nuclear and elementary particle physics: 431GEV/Cmulti-wire proportional drift chamberperformanceParticle physicsNuclear and High Energy PhysicsCOLLISIONSelectron-pion identificationneural networkInstrumentationFOS: Physical sciencesTransition radiation detector; Multi-wire proportional drift chamber; Fibre/foam sandwich radiator; Xenon-based gas mixture; Tracking; Ionisation energy loss; dE/dx; TR; Electron-pion identification; Neural network; Trigger114 Physical sciencesMomentumNuclear physicsionisation energy loss0103 physical sciencesdE/dxDRIFT CHAMBERSdE/dx Electron-pion identification Fibre/foam sandwich radiator Ionisation energy loss Multi-wire proportional drift chamber Neural network TR Tracking Transition radiation detector Trigger Xenon-based gas mixture Nuclear and High Energy Physics Instrumentation.ddc:530[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]seuranta010306 general physicsdetector: designNuclear and High Energy PhysicNeuralCOLLIDING BEAM EXPERIMENTTRD PROTOTYPESelectron: particle identificationta114010308 nuclear & particles physics:Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431 [VDP]fibre/foam sandwich radiatortriggercalibrationNATURAL SCIENCES. Physics.Neural networkdE/dx; Electron-pion identification; Fibre/foam sandwich radiator; Ionisation energy loss; Multi-wire proportional drift chamber; Neural network; TR; Tracking; Transition radiation detector; Trigger; Xenon-based gas mixtureTriggerdE/dx; Electron-pion identification; Fibre/foam sandwich radiator; Ionisation energy loss; Multi-wire proportional drift chamber; Neural network; TR; Tracking; Transition radiation detector; Trigger; Xenon-based gas mixture; Nuclear and High Energy Physics; InstrumentationnetworkELECTRON IDENTIFICATIONTRDHigh Energy Physics::ExperimentALICE (propellant)ENERGY-LOSSNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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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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