0000000000308949

AUTHOR

Peo Hansen

showing 3 related works from this author

Measurements ofWγandZγproduction inppcollisions ats=7  TeVwith the ATLAS detector at the LHC

2013

The integrated and differential fiducial cross sections for the production of a W or Z boson in association with a high-energy photon are measured using pp collisions at root s = 7 TeV. The analyse ...

QuarkPhysicsNuclear and High Energy PhysicsParticle physicsLarge Hadron ColliderPhoton010308 nuclear & particles physicsAtlas detectorHigh Energy Physics::PhenomenologyTevatronTechnicolor01 natural sciences7. Clean energyNuclear physicsmedicine.anatomical_structureAtlas (anatomy)0103 physical sciencesmedicine010306 general physicsBosonPhysical Review D
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Measurements of spin correlation in top-antitop quark events from proton-proton collisions ats=7  TeVusing the ATLAS detector

2014

Measurements of spin correlation in top quark pair production are presented using data collected with the ATLAS detector at the LHC with proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 4.6 fb(-1). Events are selected in final states with two charged leptons and at least two jets and in final states with one charged lepton and at least four jets. Four different observables sensitive to different properties of the top quark pair production mechanism are used to extract the correlation between the top and antitop quark spins. Some of these observables are measured for the first time. The measurements are in good agreement with the Stan…

QuarkPhysicsNuclear and High Energy PhysicsParticle physicsTop quarkLarge Hadron Collider010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyTevatron01 natural sciences7. Clean energyBottom quarkNuclear physicsPair production0103 physical sciencesHigh Energy Physics::Experiment010306 general physicsLeptonBosonPhysical Review D
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Search for Quantum Black Hole Production in High-Invariant-MassLepton+JetFinal States UsingppCollisions ats=8  TeVand the ATLAS Detector

2014

This Letter presents a search for quantum black-hole production using 20.3 fb(-1) of data collected with the ATLAS detector in pp collisions at the LHC at root s = 8 TeV. The quantum black holes are assumed to decay into a final state characterized by a lepton (electron or muon) and a jet. In either channel, no event with a lepton-jet invariant mass of 3.5 TeV or more is observed, consistent with the expected background. Limits are set on the product of cross sections and branching fractions for the lepton + jet final states of quantum black holes produced in a search region for invariant masses above 1 TeV. The combined 95% confidence level upper limit on this product for quantum black hol…

PhysicsParticle physicsMuonLarge Hadron ColliderMesonAstrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::PhenomenologyGeneral Physics and AstronomyElementary particleElectronNuclear physicsBlack holeGeneral Relativity and Quantum CosmologyHigh Energy Physics::ExperimentInvariant massLeptonPhysical Review Letters
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