Search results for "PAIR CROSS-SECTION"

showing 2 items of 2 documents

Measurement of the mass of the W boson using direct reconstruction at √s = 183 GeV

1999

From data corresponding to an integrated luminosity of 53.5 pb(-1) taken during the 183 GeV run in 1997, DELPHI has measured the W mass from direct reconstruction of WW --> lq (q) over bar and WW --> q (q) over bar q (q) over bar events. Combining these channels, a value of m(w) = 80.238 +/- 0.154(stat) +/- 0.035(syst) +/- 0.035(fsi) +/- 0.021 (LEP) GeV/c(2) is obtained, where fsi denotes final state interaction. Combined with the W mass obtained by DELPHI from the WW production cross-section and with the direct measurement at 172 GeV this leads to a measured value of m(w) = 80.270 +/- 0.137(stat) +/- 0.031(syst) +/- 0.030(fsi) +/- 0.021(LEP)GeV/c(2), in good agreement with the Standard Mod…

Nuclear and High Energy PhysicsParticle physicsEINSTEIN CORRELATIONSCLUSTERING-ALGORITHMElectron–positron annihilationMathematicsofComputing_GENERALCOLOR DIPOLE MODEL01 natural sciencesComputer Science::Digital LibrariesPartícules (Física nuclear)LuminosityStandard ModelPHYSICSEVENTSNuclear physicsLEP20103 physical sciencesMONTE-CARLO PROGRAM[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]ANNIHILATION010306 general physicsDELPHIPhysicsAnnihilation010308 nuclear & particles physicsE(+)E(-) INTERACTIONSTheoryofComputation_GENERALLARGE ELECTRON POSITRON COLLIDERMONTE-CARLO PROGRAM; PAIR CROSS-SECTION; COLOR DIPOLE MODEL; E(+)E(-) INTERACTIONS; EINSTEIN CORRELATIONS; CLUSTERING-ALGORITHM; ANNIHILATION; PHYSICS; EVENTS; LEP2PARTICLE PHYSICS; LARGE ELECTRON POSITRON COLLIDER; DELPHIComputer Science::Mathematical SoftwarePARTICLE PHYSICSProduction (computer science)Física nuclearPAIR CROSS-SECTIONParticle Physics - ExperimentBar (unit)
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Measurements of the top quark branching ratios into channels with leptons and quarks with the ATLAS detector

2015

Measurements of the branching ratios of top quark decays into leptons and jets using events with t[bar over t] (top antitop) pairs are reported. Events were recorded with the ATLAS detector at the LHC in pp collisions at a center-of-mass energy of 7 TeV. The collected data sample corresponds to an integrated luminosity of 4.6  fb[superscript −1]. The measured top quark branching ratios agree with the Standard Model predictions within the measurement uncertainties of a few percent.

decay [top]Top quarkБольшой адронный коллайдерAtlas detectormeasured [cross section]верхние кваркиpair production [top]multiplicity [lepton]High Energy Physics - ExperimentScatteringSubatomär fysikHigh Energy Physics - Experiment (hep-ex)лептоныSubatomic PhysicsJets[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]scattering [p p]CollisionsSUPERSYMMETRYGeneralLiterature_REFERENCE(e.g.dictionariesencyclopediasglossaries)протон-протонные столкновенияQCPhysicsLarge Hadron ColliderSettore FIS/01 - Fisica SperimentaleSupersymmetryATLASTop Quark Branching RatiosCERN LHC CollProton–proton collisions7000 GeV-cmsPAIR CROSS-SECTIONcolliding beams [p p]Particle Physics - Experiment((n)jet lepton) [final state]top quark branching ratios; leptons; quarks; ATLAS detectorQuarkParticle physicsNuclear and High Energy PhysicsCiências Naturais::Ciências Físicas530 Physics:Ciências Físicas [Ciências Naturais]FOS: Physical sciencesPAIR CROSS-SECTION; PARTON DISTRIBUTIONS; PP COLLISIONS; SUPERSYMMETRY; TEVBranching (polymer chemistry)Accelerator Physics and Instrumentation530Nuclear physicsddc:530Science & TechnologyPP COLLISIONSScatteringHigh Energy Physics::PhenomenologyFísicaAcceleratorfysik och instrumenteringLeptons and Quarksbranching ratio: measured [top]PARTON DISTRIBUTIONSExperimental High Energy PhysicsTEVp p --> 2top anythingHigh Energy Physics::ExperimentATLAS детекторhadronic decay [tau]Leptonexperimental results
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