Fragmentation Function in Non-Equilibrium QCD Using Closed-Time Path Integral Formalism

Abstract

In this paper we implement Schwinger-Keldysh closed-time path integral formalism in non-equilibrium QCD to the definition of Collins-Soper fragmentation function. We consider a high p_T parton in QCD medium at initial time t_0 with arbitrary non-equilibrium (non-isotropic) distribution function f(\vec{p}) fragmenting to hadron. We formulate parton to hadron fragmentation function in non-equilibrium QCD in the light-cone quantization formalism. It may be possible to include final state interactions with the medium via modification of the Wilson lines in this definition of the non-equilibrium fragmentation function. This may be relevant to study hadron production from quark-gluon plasma at RHIC and LHC.

15 pages latex, Accepted for Publication in European Physical Journal C

References in corpus (4)

• NRQCD Factorization and Velocity-dependence of NNLO Poles in Heavy Quarkonium Production
• Color Transfer in Associated Heavy-Quarkonium Production
• Color Transfer Enhancement for Heavy Quarkonium Production
• Fragmentation, NRQCD and Factorization in Heavy Quarkonium Production

Cited by in corpus (5)

• Factorization of Soft and Collinear Divergences in Non-Equilibrium Quantum Field Theory
• Proof of Factorization of Fragmentation Function in Non-Equilibrium QCD
• Altarelli-Parisi Equation in Non-Equilibrium QCD
• Jet Quenching and Gluon to Hadron Fragmentation Function in Non-Equilibrium QCD at RHIC and LHC
• Gauge Fixing Identity in the Background Field Method of QCD in Pure Gauge