Phenomenological consequences of enhanced bulk viscosity near the QCD critical point

Monnai, Akihiko; Mukherjee, Swagato; Yin, Yi

doi:10.1103/PhysRevC.95.034902

Title: Phenomenological consequences of enhanced bulk viscosity near the QCD critical point

Journal Article · Mon Mar 06 00:00:00 EST 2017 · Physical Review. C

DOI:https://doi.org/10.1103/PhysRevC.95.034902· OSTI ID:1376097

Monnai, Akihiko ^[1]; Mukherjee, Swagato ^[2]; Yin, Yi ^[3]

Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN BNL Research Center; Institute of Theoretical Physics, CNRS URA (France)
Brookhaven National Lab. (BNL), Upton, NY (United States). Department of Physics
Brookhaven National Lab. (BNL), Upton, NY (United States). Department of Physics; Massachusetts Institute of Technology, Cambridge (MA). Center for Theoretical Physics

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. Here, 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. In conclusion, 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.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Under Secretary for Science (S-4); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0012704

OSTI ID:: 1376097

Alternate ID(s):: OSTI ID: 1345856

Report Number(s):: BNL-113923-2017-JA

Journal Information:: Physical Review. C, Vol. 95, Issue 3; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 33 works

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