• Corpus ID: 119161989

Divergence of the Chapman-Enskog expansion in relativistic kinetic theory

@article{Denicol2016DivergenceOT,
  title={Divergence of the Chapman-Enskog expansion in relativistic kinetic theory},
  author={Gabriel S. Denicol and Jorge Noronha},
  journal={arXiv: Nuclear Theory},
  year={2016}
}
In this letter we show for the first time that the relativistic Chapman-Enskog series for a massless gas undergoing Bjorken expansion diverges. In order to fix this problem, we propose a novel type of expansion that includes non-perturbative contributions in the Knudsen number that are not considered in Chapman-Enskog theory. This approach is in good agreement with exact solutions of the Boltzmann equation for a wide range of values of Knudsen number and does not display the clear signs of… 

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