Search results for "Proton Proton Collisions"

showing 3 items of 13 documents

Search for WH production with a light Higgs boson decaying to prompt electron-jets in proton–proton collisions at \(\sqrt {s}=7\)  TeV with the ATLAS…

2013

A search is performed for WH production with a light Higgs boson decaying to hidden-sector particles resulting in clusters of collimated electrons, known as electron-jets. The search is performed with 2.04 fb[superscript −1] of data collected in 2011 with the ATLAS detector at the Large Hadron Collider in proton–proton collisions at √s=7 TeV . One event satisfying the signal selection criteria is observed, which is consistent with the expected background rate. Limits on the product of the WH production cross section and the branching ratio of a Higgs boson decaying to prompt electron-jets are calculated as a function of a Higgs boson mass in the range from 100 to 140 GeV.

Standard ModelAtlas detectorGeneral Physics and AstronomyElectron7. Clean energy01 natural sciencesSignal selectionHigh Energy Physics - ExperimentLepton-JetsHigh Energy Physics - Experiment (hep-ex)Naturvetenskap[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Nuclear ExperimentQCPhysicsddc:539Large Hadron ColliderSettore FIS/01 - Fisica SperimentaleSignal selectionBranching ratioATLASLarge Hadron ColliderComputingMethodologies_DOCUMENTANDTEXTPROCESSINGHiggs bosonLHCNatural SciencesParticle Physics - ExperimentParticle physics530 PhysicsCiências Naturais::Ciências FísicasHiggs bosonAstrophysics::High Energy Astrophysical Phenomena:Ciências Físicas [Ciências Naturais]FOS: Physical sciencesddc:500.2530Collimated lightNuclear physics0103 physical sciencesddc:530High Energy Physics010306 general physicsW BOSONScience & TechnologyProton proton collisions010308 nuclear & particles physicsBranching fractionATLAS detectorsHigh Energy Physics::PhenomenologyFísicaMassEnergiesHidden sectorProduction cross sectionHiggs boson; electron-jets; proton–proton collisions; ATLAS detectorHADRON-HADRON COLLISIONSExperimental High Energy PhysicsHigh Energy Physics::Experiment
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Search for Magnetic Monopoles and Stable High-Electric-Charge Objects in 13 Tev Proton-Proton Collisions with the ATLAS Detector

2020

We thank CERN for the very successful operation of the LHC, aswell as the support staff fromour institutionswithout whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; FWF, BMWFW, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq, FAPESP, Brazil; NSERC, CFI, NRC, Canada; CERN; CONICYT, Chile; CAS, NSFC, MOST, China; COLCIENCIAS, Colombia; VSC CR, MSMT CR, MPO CR, Czech Republic; DNSRC, DNRF, Denmark; IN2P3-CNRS, CEA-DRF/IRFU, France; SRNSFG, Georgia; MPG, HGF, BMBF, Germany; GSRT, Greece; RGC, Hong Kong SAR, Hong Kong China; Benoziyo Center, ISF, Israel; INFN, Italy; JSPS, MEXT, Japan; JINR; CNRST, Morocco; NWO, Nether…

electric [charge]Drell-Yan process:Kjerne- og elementærpartikkelfysikk: 431 [VDP]Magnetic monopolesProton13000 GeV-cmsPhysics::Instrumentation and Detectorselectromagnetic [calorimeter]magnetic [charge]General Physics and Astronomy7. Clean energy01 natural scienceschannel cross section: upper limitHigh Energy Physics - Experimentmagnetic monopole: massSubatomär fysikparticle: stabilityHigh Energy Physics - Experiment (hep-ex)magnetic monopole: pair productionSubatomic Physicsscattering [p p][PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]tracking detectorstability [particle]0 [spin]1/2 [spin]Particle productionHadron collidersPhysicsRange (particle radiation)Large Hadron Colliderupper limit [channel cross section]DetectorSettore FIS/01 - Fisica Sperimentalemass [magnetic monopole]ATLAS3. Good health:Nuclear and elementary particle physics: 431 [VDP]CERN LHC Collhigh [ionization]ATLAS Detectorslower limit [mass]atlas; lhc; higgs;colliding beams [p p]pair production [magnetic monopole]Particle Physics - ExperimentsignatureDirect Productionp p: scatteringHigh-Ionizationdirect production [magnetic monopole]530 PhysicsCiências Naturais::Ciências Físicasmass: lower limit:Ciências Físicas [Ciências Naturais]Magnetic monopolespin: 0FOS: Physical sciencesLHC ATLAS High Energy Physicsddc:500.2Electromagnetic CalorimeterElectric chargeComputer Science::Digital LibrariesChargeNuclear physicsionization: high0103 physical sciencesTransition Radiation Trackersddc:530High Energy Physicsspin: 1/2010306 general physicsCiencias ExactasATLAS Collaborationcharge: magneticmagnetic monopolesS028CScience & Technologyhep-excharge: electricFísicaCharge (physics)triggerPair productioncalorimeter: electromagneticProton Proton CollisionsExperimental High Energy PhysicsMagnetic ChargesElementary Particles and FieldsHigh Energy Physics::Experimenttransition radiationHadron-hadron collisionsp p: colliding beamsmagnetic monopole: direct productionexperimental resultsPhysical Review Letters
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Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at √sNN = 5.02 TeV

2016

The pseudorapidity density of charged particles, dNch=dη, at midrapidity in Pb-Pb collisions has been measured at a center-of-mass energy per nucleon pair of √sNN=5.02 TeV. For the 5% most central collisions, we measure a value of 1943±54. The rise in dNch=dη as a function of √sNN is steeper than that observed in proton-proton collisions and follows the trend established by measurements at lower energy. The increase of dNch=dη as a function of the average number of participant nucleons, hNparti, calculated in a Glauber model, is compared with the previous measurement at √sNN=2.76 TeV. A constant factor of about 1.2 describes the increase in dNch=dη from √sNN=2,76 to 5.02 TeV for all central…

proton proton collisionsconstant factorsdifferent mechanismsnuclear collisionsparticle productionpseudorapiditieslyijyNuclear Experimentcharged particle multiplicitiestellurium compoundshigh energy physicspb-pb collisions
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