Fragmentation function in non-equilibrium QCD using closed-time path integral formalism |
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Authors: | Gouranga C Nayak |
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Institution: | (1) Department of Physics, University of Illinois, Chicago, IL 60607, USA |
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Abstract: | In this paper we implement the Schwinger–Keldysh closed-time path integral formalism in non-equilibrium QCD in accordance
to the definition of the Collins–Soper fragmentation function. We consider a high-p
T parton in QCD medium at initial time τ
0 with an arbitrary non-equilibrium (non-isotropic) distribution function
fragmenting to a hadron. We formulate the 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 a modification of the Wilson
lines in this definition of the non-equilibrium fragmentation function. This may be relevant to the study of hadron production
from a quark–gluon plasma at RHIC and LHC. |
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Keywords: | PACS" target="_blank">PACS 12 39 St 13 87 Fh 13 87 Ce 13 85 Ni |
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