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arXiv · 1604.05291

A Lagrangian formulation of relativistic Israel-Stewart hydrodynamics

Giorgio Torrieri·David Montenegro
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Abstract

We rederive relativistic hydrodynamics as a Lagrangian effective theory using the doubled coordinates technique, allowing us to include dissipative terms. We include Navier-Stokes shear and bulk terms, as well as Israel-Stewart relaxation time terms, within this formalism. We show how the inclusion of shear viscosity, and the requirement of a bounded energy-momentum "vacuum", forces the inclusion of the Israel-Stewart term into the theory, thereby providing a justification for the origin and uniqueness of these terms.

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Giorgio Torrieri, David Montenegro. 2016-11-01. A Lagrangian formulation of relativistic Israel-Stewart hydrodynamics. https://doi.org/10.1103/physrevd.94.065042

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