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Paper   IPM / Particles And Accelerator / 16021
School of Particles and Accelerator
  Title:   Conformal Bjorken flow in the general frame and its attractor: Similarities and discrepancies with the Muller-Israel-Stewart formalism
1.  Masoud Shokri
2.  Farid Taghinavaz
  Status:   Published
  Journal: Phys. Rev. D
  No.:  036022
  Vol.:  102
  Year:  2020
  Pages:   15
  Supported by:  IPM
It has been recently claimed that the first order hydrodynamics can be stable and casual in a general frame other than the usually used Landau or Eckart frames. We investigate the implications of the general frame approach for Bjorken flow. We show that certain transport coefficients that are introduced in this approach act as regulators similar to the Muller-Israel-Stewart parameters. The stable first-order hydro in the general frame approach gives rise to a non-linear equation of motion whose solutions decay to an attractor at late-times. We find an analytical approximation form for the attractor and show that its early-time behavior is consistent with the stability and casualty conditions proposed by Bemfica, Disconzi, Noronha, and Kovtun.

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