Quark and gluon distributions at the earliest stage of heavy ion collision

Abstract

Using the general framework of quantum field kinetics we consider new principles to compute initial distribution of quarks and gluons after the first hard interaction of heavy ions. We start by rewriting the integral equations of QCD in the form which is generalizations of the familiar QCD evolution equations. These equations describe both space-time-- and $(x,Q^2)$--evolution before the collision, and allow one to use the $ep$ DIS data without reference to parton phenomenology. New technique generate perturbation theory that avoid double count of the processes, does not contain an artificial factorization scale, and does not require low-momentum cut-offs since infrared behavior is controlled by the DIS data.

30 pages, REVTeX, 5 postscript figures appended

References in corpus (8)

• Computing Quark and Gluon Distribution Functions for Very Large Nuclei
• Gluon Distribution Functions for Very Large Nuclei at Small Transverse Momentum
• Leptoproduction of Heavy Quarks II -- A Unified QCD Formulation of Charged and Neutral Current Processes from Fixed-target to Collider Energies
• Parton Distributions of the Proton
• Properties of the BFKL equation and structure function predictions for HERA
• Charm Production at RHIC to O(\ALPHA_S^3)
• Quantum Field Kinetics
• QCD Evolution Equations for High Energy Partons in Nuclear Matter

Cited by in corpus (13)

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• From Kadanoff-Baym dynamics to off-shell parton transport
• Effective QCD and transport description of dilepton and photon production in heavy-ion collisions and elementary processes
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• Exploring the partonic phase at finite chemical potential within an extended off-shell transport approach
• Nonequilibrium Quantum-Field Dynamics and Off-Shell Transport for ${\varphi }^4$-theory in 2+1 dimensions
• Quantum Field Kinetics of QCD: Quark-Gluon Transport Theory for Lightcone Dominated Processes
• Scenario for Ultrarelativistic Nuclear Collisions: Space--Time Picture of Quantum Fluctuations and the Birth of QGP
• Partons in Phase Space
• Scenario for Ultrarelativistic Nuclear Collisions: II. Geometry of quantum states at the earliest stage
• Scenario for Ultrarelativistic Nuclear Collisions: IV. Effective quark mass at the early stage
• Quantum collisions of finite-size ultrarelativistic nuclei
• Accessing the Space-Time Development of Heavy-Ion Collisions With Theory And Experiment