Phenomenological consequences of enhanced bulk viscosity near the QCD critical point
Author(s)
Monnai, Akihiko; Mukherjee, Swagato; Yin, Yi
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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.
Date issued
2017-03Department
Massachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
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
ISSN
2469-9985
2469-9993