Phenomenological consequences of enhanced bulk viscosity near the QCD critical point
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PhysRevC.95.034902.pdf
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Author(s)
Monnai, Akihiko
Mukherjee, Swagato
Yin, Yi
Date Issued
March 2017
Journal
Physical Review C
Publisher
American Physical Society
Citation
Monnai, Akihiko, Swagato Mukherjee, and Yi Yin. “Phenomenological Consequences of Enhanced Bulk Viscosity near the QCD Critical Point.” Physical Review C 95.3 (2017): n. pag. © 2017 American Physical Society
Version
Final published version
Abstract
In the proximity of the QCD critical point the bulk viscosity of quark-gluon matter is expected to be proportional to nearly the third power of the critical correlation length, and become significantly enhanced. This work is the first attempt to study the phenomenological consequences of enhanced bulk viscosity near the QCD critical point. For this purpose, we implement the expected critical behavior of the bulk viscosity within a non-boost-invariant, longitudinally expanding 1+1 dimensional causal relativistic hydrodynamical evolution at nonzero baryon density. We demonstrate that the critically enhanced bulk viscosity induces a substantial nonequilibrium pressure, effectively softening the equation of state, and leads to sizable effects in the flow velocity and single-particle distributions at the freeze-out. The observable effects that may arise due to the enhanced bulk viscosity in the vicinity of the QCD critical point can be used as complementary information to facilitate searches for the QCD critical point.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevC.95.034902
