68 citations · 372 across the 29 of their papers we have counts for
18 papers · 1 filter
Propagation of Gluons From a Non-Perturbative Evolution Equation in Axial Gauges
Klaus Geiger
We derive a non-perturbative evolution equation for the gluon propagator in axial gauges based on the framework of Wetterich's formulation of the exact renormalization group. We ob…
A QCD space-time analysis of quarkonium formation and evolution in hadronic collisions
Klaus Geiger
The production of heavy quarkonium as QQbar bound-states in hadron-hadron collisions is considered within the framework of a space-time description, combining parton-cascade evolut…
Signatures of Parton Exogamy in e+ e- -> W+ W- -> hadrons
John Ellis, Klaus Geiger
We propose possible signatures of `exogamous' combinations between partons in the different W+ and W- hadron showers in e+e- -> W+W- events with purely hadronic final states. Withi…
VNI-3.1: MC-simulation program to study high-energy particle collisions in QCD by space-time evolution of parton-cascades and parton-hadron conversion
Klaus Geiger
VNI is a general-purpose Monte-Carlo event-generator, which includes the simulation of lepton-lepton, lepton-hadron, lepton-nucleus, hadron-hadron, hadron-nucleus, and nucleus-nucl…
Non-equilibrium QCD: Interplay of hard and soft dynamics in high-energy multi-gluon beams
Klaus Geiger
A quantum-kinetic formulation of the dynamical evolution of a high-energy non-equilibrium gluon system at finite density is developed, to study the interplay between quantum fluctu…
Non-equilibrium QCD of high-energy multi-gluon dynamics
Klaus Geiger
I discuss an approach to derive from first principles, a real-time formalism to study the dynamical interplay of quantum and statistical-kinetic properties of non-equilibrium multi…
Deep-Inelastic Final States in a Space-Time Description of Shower Development and Hadronization
John Ellis, Klaus Geiger, Henryk Kowalski
We extend a quantum kinetic approach to the description of hadronic showers in space, time and momentum space to deep-inelastic collisions, with particular reference to experi…
Space, Time and Color in Hadron Production Via e+e- -> Z0 and e+e- -> W+W-
John Ellis, Klaus Geiger
The time-evolution of jets in hadronic e+e- events at LEP is investigated in both position- and momentum-space, with emphasis on effects due to color flow and particle correlations…
Quantum Field Kinetics of QCD: Quark-Gluon Transport Theory for Lightcone Dominated Processes
Klaus Geiger
A quantum kinetic formalism is developed to study the dynamical interplay of quantum and statistical-kinetic properties of non-equilibrium multi-parton systems produced in high-ene…
REAL-TIME DESCRIPTION OF PARTON-HADRON CONVERSION AND CONFINEMENT DYNAMICS
John Ellis, Klaus Geiger
We propose a new and universal approach to the hadronization problem that incorporates both partonic and hadronic degrees of freedom in their respective domains of relevance, and t…
REAL-TIME DYNAMICS OF PARTON-HADRON CONVERSION
John Ellis, Klaus Geiger
We propose a new and universal approach to the hadronization problem that incorporates both perturbative QCD and effective field theory in their respective domains of validity and…
Effective Field Theory Approach to Parton-Hadron Conversion in High Energy QCD Processes
K. Geiger
A QCD based effective action is constructed to describe the dynamics of confinement and symmetry breaking in the process of parton-hadron conversion. The deconfined quark and gluon…
High Density QCD and Entropy Production at Heavy Ion Colliders
Klaus Geiger
The role of entropy production in the context of probing QCD properties at high densities and finite temperatures in ultra-relativistic collisions of heavy nuclei is inspected. It…
Dynamic Gluon Confinement in High Energy Processes within Effective QCD Field Theory
K. Geiger
An effective Lagrangian approach to describe the dynamics of confinement and symmetry breaking in the process of quark-gluon to hadron conversion is proposed. The deconfined quark…
Chemical Equilibration in the Parton Cascade Model
K. Geiger, J. I. Kapusta
This comment is hereby withdrawn, because the paper by D. Seibert, KSUCNR-005-94 and nucl-th/9403005 was withdrawn and it was acknowleged that the parton cascade model does approac…
Analytic Solutions of QCD Evolution Equations for Parton Cascades Inside Nuclear Matter at Small X
K. Geiger
An analytical method is presented to solve generalized QCD evolution equations for the time development of parton cascades in a nuclear environment. Closed solutions for the spectr…
Comment on Transverse Mass Dependence of Partonic Dilepton Production in Ultra-Relativistic Heavy Ion Collisions
K. Geiger
Comment on scale breaking effects in dilepton emission from partons during the early stage of ultra-relativistic heavy ion collisions
QCD Evolution Equations for High Energy Partons in Nuclear Matter
Klaus Geiger, Berndt Mueller
We derive a generalized form of Altarelli-Parisi equations to decribe the time evolution of parton distributions in a nuclear medium. In the framework of the leading logarithmic ap…