Search results for "transverse momentum [quark]"

showing 2 items of 2 documents

Multiplicity dependence of the average transverse momentum in pp, p–Pb, and Pb–Pb collisions at the LHC

2013

The average transverse momentum $\langle p_{\rm T}\rangle$ versus the charged-particle multiplicity $N_{\rm ch}$ was measured in p-Pb collisions at a collision energy per nucleon-nucleon pair $\sqrt{s_{\rm NN}}=5.02$ TeV and in pp collisions at collision energies of $\sqrt{s}=0.9$, 2.76, and 7 TeV in the kinematic range $0.15<p_{\rm T}<10.0$ GeV/$c$ and $|\eta|<0.3$ with the ALICE apparatus at the LHC. These data are compared to results in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV at similar charged-particle multiplicities. In pp and p-Pb collisions, a strong increase of $\langle p_{\rm T}\rangle$ with $N_{\rm ch}$ is observed, which is much stronger than that measured in Pb-Pb colli…

:Kjerne- og elementærpartikkelfysikk: 431 [VDP]Multiplicity dependencePROTON-PROTON COLLISIONSPb-Pbpp01 natural sciencesSpectral lineHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)ALICEMultiplicity dependence; transverse momentum; pp; p–Pb; and Pb–Pb collisionsPions[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]multiplicityNuclear Experiment (nucl-ex)Nuclear ExperimentNuclear ExperimentALICE experiment; Transverse momentum and particle multiplicity; p-p; p-Pb and Pb-Pb collisionsPhysicsLarge Hadron ColliderPhysicsand Pb–Pb collisionsSpectraCharged particleheavy ion:Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431 [VDP]PRIRODNE ZNANOSTI. Fizika.:Nuclear and elementary particle physics: 431 [VDP]CHARGED-PARTICLESRoot-S=0.9Transverse momentum7 TEVParticle Physics - ExperimentParticle physicsNuclear and High Energy Physicsp–PbAstrophysics::High Energy Astrophysical PhenomenaVDP::Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431FOS: Physical sciencestransverse momentum[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]p-pNuclear physicsPion0103 physical sciencesNuclear Physics - ExperimentTransverse momentum and particle multiplicity010306 general physicsLONG-RANGEp-PbVDP::Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431ta114010308 nuclear & particles physicsPROTON-PROTON COLLISIONS; CHARGED-PARTICLES; 7 TEV; ANGULAR-CORRELATIONS; LONG-RANGEHigh Energy Physics::Phenomenology:Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431 [VDP]ALICE experimentKaonsMultiplicity (mathematics)Collisionmultiplicity; transverse momentum; pp; p-Pb; Pb-Pb; heavy ion; ALICENATURAL SCIENCES. Physics.ANGULAR-CORRELATIONSHeavy ionHigh Energy Physics::ExperimentPROTON-PROTON COLLISIONS; CHARGED-PARTICLES; 7 TEV; ANGULAR-CORRELATIONS; LONG-RANGE; ROOT-S=0.9; MODEL; SPECTRA; PIONS; KAONSModelp-Pb and Pb-Pb collisions
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Jet fragmentation transverse momentum distributions in pp and p-Pb collisions at √s, √sNN = 5.02 TeV

2021

Jet fragmentation transverse momentum (jT) distributions are measured in proton-proton (pp) and proton-lead (p-Pb) collisions at √sNN = 5.02 TeV with the ALICE experiment at the LHC. Jets are reconstructed with the ALICE tracking detectors and electromagnetic calorimeter using the anti-kT algorithm with resolution parameter R = 0.4 in the pseudorapidity range |η| < 0.25. The jT values are calculated for charged particles inside a fixed cone with a radius R = 0.4 around the reconstructed jet axis. The measured jT distributions are compared with a variety of parton-shower models. Herwig and Pythia 8 based models describe the data well for the higher jT region, while they underestimate the low…

related to the perturbative component of the fragmentation processthe measured trends are successfully described by all models except for Herwig. For the wide componentHerwig and PYTHIA 8 based models slightly underestimate the data for the higher jet transverse momentum region. These measurements set constraints on models of jet fragmentation and hadronisation.Nuclear and High Energy Physicswhile that of the inverse gamma function increases with increasing jet transverse momentum. For the narrow componentHeavy Ion Experimentsand with a Gaussian for lower jT values (called the “narrow component”)hiukkasfysiikkawhile they underestimate the lower jT region. The jT distributions are further characterised by fitting them with a function composed of an inverse gamma function for higher jT values (called the “wide component”)predominantly connected to the hadronisation process. The width of the Gaussian has only a weak dependence on jet transverse momentumJet fragmentation transverse momentum (jT) distributions are measured in proton-proton (pp) and proton-lead (p-Pb) collisions at √sNN = 5.02 TeV with the ALICE experiment at the LHC. Jets are reconstructed with the ALICE tracking detectors and electromagnetic calorimeter using the anti-kT algorithm with resolution parameter R = 0.4 in the pseudorapidity range |η| < 0.25. The jT values are calculated for charged particles inside a fixed cone with a radius R = 0.4 around the reconstructed jet axis. The measured jT distributions are compared with a variety of parton-shower models. Herwig and PYTHIA 8 based models describe the data well for the higher jT region
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