0000000001000776

AUTHOR

Jorge Alonso

showing 3 related works from this author

Study of jet shapes in inclusive jet production inppcollisions ats=7  TeVusing the ATLAS detector

2011

Jet shapes have been measured in inclusive jet production in proton-proton collisions at root s = 7 TeV using 3 pb(-1) of data recorded by the ATLAS experiment at the LHC. Jets are reconstructed using the anti-k(t) algorithm with transverse momentum 30 GeV < p(T) < 600 GeV and rapidity in the region vertical bar y vertical bar < 2.8. The data are corrected for detector effects and compared to several leading-order QCD matrix elements plus parton shower Monte Carlo predictions, including different sets of parameters tuned to model fragmentation processes and underlying event contributions in the final state. The measured jets become narrower with increasing jet transverse momentum and the je…

Quantum chromodynamicsPhysicsNuclear and High Energy PhysicsParticle physicsLarge Hadron Collider010308 nuclear & particles physicsAstrophysics::High Energy Astrophysical PhenomenaMonte Carlo methodATLAS experimentHERADeep inelastic scattering01 natural sciencesNuclear physics0103 physical sciencesHigh Energy Physics::ExperimentRapidityNuclear Experiment010306 general physicsParton showerPhysical Review D
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Search for quark contact interactions in dijet angular distributions in pp collisions at s=7 TeV measured with the ATLAS detector

2011

Dijet angular distributions from the first LHC pp collisions at center-of-mass energy sqrt(s) = 7 TeV have been measured with the ATLAS detector. The dataset used for this analysis represents an integrated luminosity of 3.1 pb-1. Dijet $\chi$ distributions and centrality ratios have been measured up to dijet masses of 2.8 TeV, and found to be in good agreement with Standard Model predictions. Analysis of the $\chi$ distributions excludes quark contact interactions with a compositeness scale $\Lambda$ below 3.4 TeV, at 95% confidence level, significantly exceeding previous limits.

QuarkPhysicsNuclear and High Energy PhysicsParticle physicsLuminosity (scattering theory)Large Hadron ColliderScale (ratio)010308 nuclear & particles physicsAtlas detectorAstrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::Phenomenology7. Clean energy01 natural sciencesStandard ModelNuclear physicsmedicine.anatomical_structureAtlas (anatomy)0103 physical sciencesmedicineHigh Energy Physics::Experiment010306 general physicsPhysics Letters B
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Measurement of underlying event characteristics using charged particles inppcollisions ats=900  GeVand 7 TeV with the ATLAS detector

2011

Measurements of charged particle distributions, sensitive to the underlying event, have been performed with the ATLAS detector at the LHC. The measurements are based on data collected using a minimum-bias trigger to select proton-proton collisions at center-of-mass energies of 900 GeV and 7 TeV. The "underlying event" is defined as those aspects of a hadronic interaction attributed not to the hard scattering process, but rather to the accompanying interactions of the rest of the proton. Three regions are defined in azimuthal angle with respect to the highest transverse momentum charged particle in the event, such that the region transverse to the dominant momentum-flow is most sensitive to …

PhysicsNuclear and High Energy PhysicsParticle physicsLarge Hadron ColliderProton010308 nuclear & particles physicsMonte Carlo methodHadron01 natural sciencesCharged particleNuclear physicsTransverse planemedicine.anatomical_structureAtlas (anatomy)0103 physical sciencesmedicineNuclear Experiment010306 general physicsEvent (particle physics)Physical Review D
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