0000000000132716

AUTHOR

Gerhard A. Schuler

showing 3 related works from this author

QCD Jets at HERA II.O(? s 2 ) four-jet cross-sections

1989

We present exact expressions for theO(α s 2 ) tree graph four-jet cross-sections in neutral current and charged current deep inelasticep scattering initiated by quarks, antiquarks and gluons including lepton polarization effects. Using helicity amplitudes the partonic cross-sections are given in concise form including all colour, flavour and statistical factors. We explicate the electroweak coupling dependence and state how the partonic cross-sections are folded with the respective parton densities to obtain theep jet cross-sections toO(α s 2 ). We present some numerical results for the neutral current one-photon exchange case. We elaborate on the cut dependence of the jet rates and present…

QuarkQuantum chromodynamicsPhysicsParticle physicsPhysics and Astronomy (miscellaneous)Neutral currentHigh Energy Physics::PhenomenologyElectroweak interactionPartonHERAHelicityGluonNuclear physicsHigh Energy Physics::ExperimentEngineering (miscellaneous)Zeitschrift f�r Physik C Particles and Fields
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O(αs2) corrections to high-qT polarized gauge boson production at hadron colliders

1991

Abstract We report first results on O(αs2) corrections to the parity conserving structure functions that describe high-qT polarized gauge boson production in hadron collisions. We present some numerical results for polarized W+ production at the Tevatron p p collider. In particular we find that the relation A0=A2 between the longitudinal and transverse interference structure functions no longer holds true at next-to-leading order (NLO). We calculate the NLO corrections to this relation.

PhysicsNuclear and High Energy PhysicsGauge bosonParticle physicsHigh Energy Physics::PhenomenologyHadronTevatronParity (physics)law.inventionNuclear physicslawPhase spaceHigh Energy Physics::ExperimentGauge theoryNuclear ExperimentColliderBosonPhysics Letters B
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QCD JETS AT HERA I.: O(αs) RADIATIVE CORRECTIONS TO ELECTROWEAK CROSS SECTIONS AND JET RATES

1989

We present the complete O(αs) corrections to the electroweak cross sections of both neutral current and charged current deep inelastic e±p scattering including lepton polarization effects. Changes in the cross section due to the inclusion of next-to-leading-log (NLL) effects are parametrized by K factors, which are defined as the ratio of the NLL O(αs) cross sections and the Born cross section. Using the standard redefinition scheme of the parton densities, we find that the K factors deviate substantially from unity for small values of the Bjorken-Scaling variable x. We also elaborate on problems that arise when defining jet cross sections in ep scattering and present numerical results for…

Quantum chromodynamicsPhysicsNuclear and High Energy PhysicsParticle physicsNeutral currentElectroweak interactionAstronomy and AstrophysicsElementary particlePartonHERAInelastic scatteringDeep inelastic scatteringAtomic and Molecular Physics and OpticsNuclear physicsInternational Journal of Modern Physics A
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